Why isn't president Biden's signature going to be on the stimulus checks, like Trump's was?

Presumably

Biden realizes

that by the time of the next election

no one will remember this particular stimulus check.

There haven't been any stimulus checks yet

He wants to help the American people he doesn’t care about receiving  credit or attention like orange donnie

Because President Biden does not have Alzheimers like Dementia Donnie does. 

Changing the printing process actually slowed those checks down.  Biden doesn't want to waste the time on vanity.

because it gives the namecalling haters who can't let go of trump one more opportunity to spew namecalling hatred aimed at trump instead of having to think critically about biden or what he's represented in government for 50 years ...

I mean, c'mon.... pretending to care about COVID deaths was SO last year.... wasn't it?

Joe complained that he didn’t have the time to sign that many checks.

you need to ask him this question