Some of these might be a little more like 8 than 5 because they have storybook-scary but still mentioning for you to have a look and decide.
Lost Words - Beyond the Page
Unpacking
Epistory - Typing Chronicles
One Step from Eden
Wargroove
Tsioque
Technically not female lead but kinda close and definitely age-appropriate:
Chicory - From creators on Wandersong + Celeste. Not positive your character is canonically female but let’s just call it very plausible and you are filling in for the titular character who is called “she”.
Donut County (technically the male racoon is the main character but the only human and next-most important character is female)
Journey (likely canonically no specific gender but great game, no dialog and could easily interpret as female if you choose)
Not what you asked for but maybe consider:
Beglitched - No human characters other than the player, puzzle game with pink and purple hacker aesthetic.
Lovers in a Dangerous Spacetime - Androgynous animals and humans pilot a wacky ship in 4 player co-op lots of hearts.
I like some of the other suggestions better than this but if you’ve already tried communicating about it and other things haven’t worked, I wonder if for some cases you could convince him to take a video or a picture. Like, if it’s a cool thing he wants you to see instead of interrupting you record it and share it when you’re available instead of right now, interrupting you. Again, I think the other proposals are better but I wonder… if you’re right about the motivation at least sometimes being just wanting to share something it might be worth attempting.
In approximate order of how strongly I recommend but all are recommended
Sayonara Wild Hearts
Epistory
Tales of Berseria
Tangle Tower (Pair of male and female protagonists through the whole game and they are very balanced for screentime)
Wargroove
Recettear: An Item Shop’s Tale
Crypt of the Necrodancer
The Stillness of the Wind
Sable
Tsioque
The Flame in the Flood
The World Next Door
Never Alone
One Step from Eden
I like that name a ton and also “Paranoid Android” is a Radiohead song from the album OK Computer. Now I’m realizing there is no comma in that title. I always thought it was “OK, Computer” because the speaker is addressing the computer. Nope, it is “OK Computer” like a label at an antique shop letting you know the computer is not Poor or Excellent but just OK.