Plenty. I have a PS5 and normally purchase Play Stations. Imo, more games are geared toward solo and adventure play. My son (10) has a fishing game and he enjoys it.
Way of the Hunter
Call of the Wild
Hunting Simulator
______________
Call of the Wild Angler
Ultimate Fishing Simulator
Fishing Planet
The Catch: Carp and Coarse
Bassmaster
All of the above are available on PS4 or PS5. PS4 games can be played on PS5 but not vice versa.
You could probably get a PS4 relatively cheap.
Also I buy games used. Games are expensive nowadays. Look into used at GameStop or on Ebay. Much cheaper. Hunting and fishing games also have a tendency to be cheaper anyhow.
Good luck. Glad to hear he's coming home.