Here's a collectible map with everything (chests, seellies, challenges, events, NPCs, Anemoculuses, Geocoluses, Shrines). Use this to mark what you have found (you can't do that on the online interactive map). :
All secret/ hidden chests for the Mondstadt Achievement [Full Guides] Genshin Impact | HoYoLAB
Genshin Impact Luxurious Chest Locations in Mondstadt | Dunia Games
NGL, I find it cute when the devs let us have chests for silly reasons like starting a fire or picking up a random piece of fruit. It really encourages you to
All 30 Mystmoon Chest locations in Genshin Impact: Mondstadt guide