Gifts for 16 year old boy

My 16 year old son is hard to buy for.  We’ve been trying to get him to make a holiday gift list and it’s 75% lego sets. He has no idea what to put on it and I'm at a loss. Budget is $20-$50 per item

Clothing is too easy, getting that on the list for grandparents.

He doesn’t play sports, not does he want to try any high school clubs.  He doesn't like bikes. He likes being at home and doesn’t really have friends.  I don’t think he’s had anyone over since 2nd grade.

He plays Roblox and Minecraft.  He codes Roblox games and is in a high school coding class. I feel there's something in this intersection of things.

He is working on finishing up being in Scouts.  He does well in the program but he doesn’t love it.  We do not need camping gear, have so much of it.

He started back into puzzles after several years of not.

He doesn’t play board games.  All the ones he gets never get opened. I have one on my own shopping list both kids might like already.

Doesn't really do crafts. He paints pumpkins once a year. Did not want to take an art class past a required fine arts credit.

We have an excess of tech.