What about Nextcloud? It’s heavier than syncthing, but would be an alternative.

I went through a bunch before settling on Kanboard. If you try kanboard, there are some plugins/themes to make it look nicer.

In the end though, I ended up moving away from it. Would be curious what you end up using!

I really like it. I don’t use it for much, but it’s super easy to have multiple servers in multiple locations and let it take care of replication.

It seemed like it was built more for the self hosting and homelab crowd and not enterprises.

Yep, you can install it directly on the proxmox host too.

Just make sure you test it and also test upgrades so you can avoid having to be on-site for those.