I’m with Paddyanne! Does he need “wee projects” of your devising? It’s his bedroom too so did you discuss the idea of shelves or does he leave that sort of thing to you?
I have never experienced this demarcation of boys’ jobs and girls’ jobs - unlike Teresa and Philip May.
My father loathed and avoided anything even faintly resembling DIY,
Dad had a theory that if everybody did everything themselves, skilled tradesmen like carpenters, painters and decorators and jobbing builders would end up going out of business.
They also had a neighbour who effectively wrecked an otherwise lovely stone cottage by years of crack-handed bodging., which he reckoned more than proved his point.
Paw likewise (initially early in our marriage when money was tight,) would put up DIY wardrobes under sufferance but latterly a Billy bookcase from IKEA was his limit.
And why not? It’s like assuming I can or want to turn collars, turn sheets sides to middle or am the only person who can be let loose in the kitchen!