"Photos" location in Android App - Show only specific folders?

Hello there,
i am auto uploading my Android Camera Photos and WhatsApp Images.
In the “Photos” section (on the left) at the Nextcloud Android App i can see the Pictures uploaded pretty nice.

I was wondering if there is a way to only see the Images in a certain folder (or to sort out stuff in any other way)? (i dont like to see the Whatsapp Pictures there, as there are tons of crap included)

another question would be (if the above is not working): do u know any good working gallery app which i can use to see my nextcloud synced photos?

thanks a lot in advanced