Following issue thread here, it would be great for QFIeld to accept a directory in SAF so that there is no need to import/export.
Current workflows involve "packaging for QFIeld" on desktop, passing the files to android (either via sync or mounting the remote via eg RSAF), then import from folder, edit the project, and export to folder.
Note the feature suggestion is independent of RSAF/Nextcloud, I only mention these because they would be useful to access shared qfield projects from either a cloud location or Network Attached Storage SMB shares.