Social media api web vs mobile

Hi guys. i need your help. does someone here know what api which using by instagram mobile apps instagram? the assumption is i make my own crawler plugin for instagram hashtag and post by api i got from web inspect element, but the hashtag isn't complete, only get 20-40 post. but when i use mobile apps to try the hashtag search, it will get every post, i tried so hard using frida for ssl pinning but that's useless. so i need y'all help for the api which use by the mobile apps. thank you!