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

Tbf you have to grind but even if y♋ou pay and unlucky, you still need to grind anyway:>

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