You're welcome! Glad it is working!
You can do this in two ways:
- setup Policy Based Routing/VPN bypass on the Pi with OpenWrt
- setup two independent networks on your Unifi system so that one uses the VPN and the other does not
(or combine both methods)
Meanwhile, since the main issue appears to be resolved now...
If your problem is solved, please consider marking this topic as [Solved]. See How to mark a topic as [Solved] for a short how-to.