Which UI? The UDM has two. Mobile devices have another. Some features are only available on one of the UIs, and when the feature is available on both, it often behaves differently. Sounds pretty straightforward to me.
I ended up buying a Protectli box (FW6E) with OPNsense preinstalled. It's been fantastic, and blows Unifi out of the water.
The fragmentation about Ubiquiti devices drives me crazy - I have the "wrong" consumer wifi AP or the "wrong" (pro)consumer router (take your pick), so half of the wifi AP functionality is disabled - but for no reasonable reason - just they have two (more?) product lines that don't work together and it's hard to realize until you get the products. Overall I've been pretty disappointed by my Ubiquiti hardware - I feel like it was advertised as higher performance and better functionality than it ended up being.
Nope, but I'd love a viable alternative. It seems like every company I look at has some big downside that makes me stick with Ubiquiti.