You should be able to select multiple images at once and then click upload via custom fields in the app

LOOM VIDEO: https://www.loom.com/share/9def99bdbcdf4c52a512e52c2ccb683e?sid=a91dabc3-e664-4880-81fc-468a48cb64c9

Without this its just a huge time drain for anyone who wants to regularly upload multiple images