Is it too late to be saved after death? then how do you explain the story of Lazarus according to Mark 6:11?

“Uncle Travus Top Pen Kuiper”, salvation must occur as an aspect of ones life experience through multiple sacred operations carried out by divinity on behalf of the living (we say, by divine prerogative and the sovereign will of GOD; by the grace of GOD). In addition to repenting for sin, the living are to experience rebirth, acknowledge atonement, and become ripe for harvest from the earth by Christ at his coming. Mature Christian believers receive the account of Lazarus returned from the dead as a sacred event provided to further prepare the followers of the Savior for his crucifixion and resurrection from the dead to appear in heaven. Life was restored to Lazarus to demonstrate that Jesus was endowed with divine authority and power; however, Lazarus was not lifted up to heaven for divine judgment as will occur in the resurrection of those who complete their mortality on the earth. In death, the dead do not continue to operate carrying on life processes, or having intent and purpose. Consider again the following:

(1.) Psalms 115: 15-18, King James Version (KJV): 15 Ye are blessed of the LORD which made heaven and earth. 16 The heaven, even the heavens, are the LORD’s: but the earth hath he given to the children of men. 17 The dead praise not the LORD, neither any that go down into silence. 18 But we will bless the LORD from this time forth and for evermore. Praise the LORD.(2.) Lazarus of the miracleThis personage was the brother of Martha and Mary of Bethania; all three were beloved friends of Jesus (John 11:5). At the request of the two sisters Jesus raised Lazarus from the dead (John 11:41-44). Soon thereafter, the Saturday before Palm Sunday, Lazarus took part in the banquet which Simon the Leper gave to Jesus in Bethania (Matthew 26:6-16; Mark 14:3-11; John 12:1-11). Many of the Jews believed in Jesus because of Lazarus, whom the chief priests now sought to put to death. The Gospels tell us no more of Lazarus (see ST. LAZARUS OF BETHANY). [Downloaded 12:25 PM, March 15, 2021 from New Advent: The Catholic Encyclopedia @ https://www.newadvent.org/cathen/09096a.htm].(3.) John 12: 1-2, KJV: Then Jesus six days before the passover came to Bethany, where Lazarus was, which had been dead, whom he raised from the dead. 2 There they made him a supper; and Martha served: but Lazarus was one of them that sat at the table with him.There is far more that should be said, correctly examined, and spiritually apprehended. (For example, (4.) John 12: 9-11, KJV: 9 Much people of the Jews therefore knew that he was there: and they came not for Jesus’ sake only, but that they might see Lazarus also, whom he had raised from the dead. 10 But the chief priests consulted that they might put Lazarus also to death; 11 Because that by reason of him many of the Jews went away, and believed on Jesus.) Even so, I trust this fragment will be useful. Be it unto you according to your faith.THE BLACK PHOENIXWashington, DC

No, the people who go to Paradise are heirs of salvation, though not all of them shall see the third heaven.  They shall be allotted rewards in the three heavens and in the reward of the Terrestrial resurrection.

It is too late to be saved, technically, when one is in hell.  There IS eventual redemption, though (Rev 20:12-14).  There is only finite punishment for finite sin -- hell is never forever.  God's love, justice, and mercy are all intact.  So where do they go after they are redeemed and resurrected?  Mostly the reward of the unnamed resurrection, probably -- the one St. Paul compared to the stars in its glory and felicity.

Mark 6 says nothing about people being saved after death.

Read John 5:28, 29; Romans 6:23, with the exception of those executed by God and those not in God's memory, all will be resurrected just as Jehovah has empowered  Jesus to do, see John 11 and read the account from verse 21 to 44, and it's not known whether Lazarus became an anointed one before he died again or not but can say the resurrection applies to him also either to heaven if he was anointed or will be on earth if not.

Luke 16:19 showed a rich man dying and trying to be saved.  The bible also says "for dust you are and to dust you will return"  So once you are dead you are gone

Depends on what you mean by saved.  Lazarus was returned from the grave.  This is not an equivalent comparison.

Do you mean Lazarus who Jesus raised from the dead in John chapter 11?  Lazarus was already a believer.  Unbelievers don't get raised and unbelievers don't get second chances after death.

Your scriptural reference is incorrect. I assume you mean the story of Lazarus the beggar in Luke 16.

If anything that story reinforces the theology that salvation must occur before death, since the unrighteous person regretted his actions in life enough to beg for someone to be sent to his relatives so they could avoid his same fate and he was told that even raising the dead wouldn't help them if they already rejected the message, (Luke 16:31). 

Mk 6:11 And if any place will not welcome you or listen to you, leave that place and shake the dust off your feet as a testimony against them.”

Huh?  What scripture are you really referring to?