You don't really need to pay tbh. There isn't an area that is locked behind money-wall. You can do 100% of Story and Lore Reading without spendin🌜g a dime.There isn't PvP or Leaderboard either.

Tbf you have to grind but even if you p🌊ay and unlucky, you still need to 𓄧grind anyway:>

And Genshin or any Gacha should be at least 16+ in rating but then again there is Fifa with PEGI𓃲 🍨3....