I have multiple rclone mounts on a windows 2019 server at home, and constantly had oddball issues mapping it with various iPad and iPhone apps (some can mount but had weird problems when going into the mounted folder)
anyway, wanted to share this file manager I ran across that's both Mac and iOS and works great
works great for playing video / photos directly as well
also supports server side copies (including within mounted rclone folders) which I have yet to see work on any other IOS file manager.