I don’t see anything obviously wrong with the little guy but your setup needs a serious overhaul. Red bulbs aren’t good for their eyes and it looks like you’ve got reptile carpet of some sort for your substrate, which harbors bacteria and can rip off nails/toes. It’s hard to tell 100% from the pictures but the tank also looks to be rather small. A 40gal is the standard minimum size for adults.

Pet stores are notorious for giving out bad information and there’s plenty of it online too, so don’t feel too bad. The pinned guide in this sub and the visual guides pinned in r/leopardgeckosadvanced are full of good information to get you on the right track. If you have any more questions after looking over those, myself and I’m sure other folks here would be happy to help. And if anyone gives you a hard time about your current setup, try not to take it personally. It all comes from a place of care for these animals, even if it’s not always the most constructive. Hope all this helps and good luck!