Hi, thank you for your reply mate. Did a bit of digging and you are completely right.
For android 10 and lower, big games only asks for READ_EXTERNAL_STORAGE permission. But with newer android versions, that single permission is split into the ones I saw. Thanks again for clearing things up mate, really appreciate it.
PS: I really really love your harem visual novel Love by the Water, it has such lively characters and great overall vibe. Didnt know I would find you here lol