It does allow sync for each of your LDAP users, but it may require an app on your phone. I use the same setup and have had success with DAVx on android.

Or the Nextcloud plug in Memories.

Doesn’t SoGo use Activesync? This wouldn’t need an app on your phone.

I tried the same setup as you a few years ago. It worked, but I didn’t like SoGo for email so moved to Nextcloud/SnappyMail and DAVx/K9 on my phone. Have been using this fine since.

I use RSS Hub https://docs.rsshub.app/en/

Agree about the Nextcloud client, but it’s easy enough to replace it with the SnappyMail plug in which works a treat.

I found the following site to be useful, but agree it’s a bit overwhelming. https://browse.feddit.de/