[NC 18.0.3] How to get option "Delete file" for imported files

NC 18.0.3 / nextcloud:apache and postgres as docker container are up and running @Rpi4.
I moved a lot of files into the container

sudo mv * /var/lib/docker/volumes/nextcloud_nextcloud/_data/data/norbert/files/Library
and triggered the scan

sudo docker exec --user www-data nextcloud_app_1 php occ files:scan --all

and changed owner and group to www-data

All the imported directories and files are visible in NC, but the “Delete file” option is missing


Any idea?

Thanks, Norbert