There are several apps that will access remote file systems and share them via iOS Files For your use case I would look at SFTP and use the ShellFish app http

There are several apps that will access remote file systems and share them via iOS Files For your use case I would look at SFTP and use the ShellFish app https://secureshellfish.app https://secureshellfish.app There are similar apps that add WebDAV servers to FIles. There are a number of media players and text editors that provide built-in WebDAV support I have also used other apps to share between Linux and iOS: DropBox, Resilio Sync SyncThing is now supported via the app Möbius Sync. (But I have yet to try it) https://www.mobiussync.com https://www.mobiussync.com