Podman - File-Permission data folder outside container

Nextcloud version (eg, 20.0.5): 28.0.3
Operating system and version (eg, Ubuntu 20.04): Debian 6.1.52-1 (2023-09-07) x86_64 GNU/Linux
podman version 4.9.3

I’m using nextcloud in a rootless podman container.

podman run --replace \
--detach \
--label "io.containers.autoupdate=registry" \
--env TZ=Europe/Berlin \
--env REDIS_HOST="127.0.0.1" \
--env MYSQL_HOST=127.0.0.1 \
--env MYSQL_DATABASE=nextcloud \
--env MYSQL_USER=nextcloud \
--env NEXTCLOUD_ADMIN_USER=admin \
--group-add keep-groups \
--volume /home/xxx/docker/appdata/nextcloud/nextcloud/:/var/www/html/ \
--volume /mnt/nvme/nextcloud:/var/www/html/data \
--pod nextcloud \
--restart on-failure \
--name nextcloud-app docker.io/library/nextcloud:fpm-alpine

And im sure its not a bug, but the way it works.
But maybe some1 can help me with this.

My data folder has the following permissions outside the container:

drwxrwx--- 6 100081 100081 4,0K 19. Mär 22:31 nextcloud/

and i know, its because of the user mapping …
root (0) inside the container is my user (1000) outside
and user www (82) is therefor user 100081.

Is there a way i can get the files having the permissions like my normal user (1000) ?
So i can access them wihtout beeing root?
I think
--userns=
is the right way, but i’m to dumb to figure out, what to do :>
or could help
podman unshare
or should i have to run as another user with --user ??

I’m overwhelmed.

Thanks in advance.