As the application is so new there are not many stores around at the moment. Hopefully as the “regular” store creators get on board, the list of codes will increase.
Right now, here are some codes from trusted youtubers:
5555 – FreeTech Applinked Code
7777 – Doc Squiffy Filelinked Code
8888 – Wot Box TV Applinked Code
6464 – Very large app store
To access any store from a browser, use the format https://i4studio.co.uk/applinked/public.php?store_id=6464
replace the 6464 with any other store code you like.