Anyone have white lined (skunk) geckos? Having issues getting it to feed...?

So Ive taken in an adult white lined gecko - it's a rescue and I'm just fostering it. I've had him for almost 2 weeks and as far as I know he isn't eating.

I've offered crickets and he doesn't eat any of them. Ive offered wax worms, silkworms, phoenix worms.....nothing. I've put some mashed up fruit and veggies in there to and again, nothing.

I'm aware of the temps 82-84 hot spot with ambient temp of around 75-78. Nighttime stays btw 72-75 and humidity is always consistently around 65-75%. He's got a 20 gal tall aquarium and I also provide very low level UVB (I know it's not required but I think low level UVB is beneficial for nocturnal lizards).

Ive never really kept geckos but like I said, he's a foster and I need to get him eating regularly. I know it takes a while to settle in before they eat sometimes but this is getting ridiculous. Once I get him feeding I'll most likely adopt him bc I don't want him going through the stress of being re-homed again as soon as he settles.

Otherwise, he's ok. Feet stick well and he's very active. I don't handle him because he's not tolerant of that at all and that's ok. I know they aren't known for being good with that. He's fine as a display animal but I need any advice from people who have skunk geckos - any tips on feeding these guys!? Any type of food that you know of thats irresistible to them? Any knowledge is welcome. Thanks!!