On the topic of solo game devs... if this sounds like your jam (and modern mobile games isn't your jam) then consider the console homebrew scene as an outlet. All the "retro" platforms still have a pulse and several are thriving enough to have competitions and forums and podcasts.
8-bit NES and 16-bit Genesis (Mega Drive) both have a supportive community and one or two publishers who can take your game from ROM.BIN to physical cart and/or digital purchase.
Hardware limitations naturally demand fewer man-hours to build out a "complete" game. You won't make a fortune. Or a dime. But then neither did a lot of one-person shops in the original 8-bit days.
[1] https://podcasts.apple.com/us/podcast/the-assembly-line-an-n...
[2] https://podcasts.apple.com/ca/podcast/homebrew-game-club/id1...