What you are thinking can be done, but it is better to remotely locate your UPS in a mech room elsewhere. The fans can get noisy on bigger units.
1. Put a dedicated feed to your UPS in mech room.
2. From there pull dedicated feeds to your devices. Terminate as normal in receptacles.
3. Put cord ends on the UPS side and plug into the UPS unit.
4. Label the wallplates so you dont have someone using them for a vaccum etc.
Doing it this way allows you to remove the UPS later (if you move or whatever) and you simply replace the single gang device box supplying the UPS with a junction box and splice the UPS feed to the leaving circuits to return the circuit to a normal setup from the panel.
You can buy the powerbridges as you are thinking, but they are a retrofit solution. If you have basement access, fishing up to the main floor is doable. (Not always easy depending on framing....
)
You seem already pretty knowledgable on how this stuff is done, but I can walk you through it if you need.
