My setup is currently:

[Layer 1] CenturyLink Fiber ONT modem/router thing
    -> [Layer 2] TP-Link switch (for VLAN tagging) 
        -> [Layer 3] Orbi router hub 
            -> [Layer 4] 10-port Gigabit switch 
                -> [Layer 5] Everything else (wired Orbi Wifi mesh, some other devices).

I just bought the Orbi router stuff, and it supports 2.5 gigabit ethernet, but I’m currently limited by my gigabit switches. I’d like to bring everything up to that 2.5 gigabit floor.

Is it possible to use a single switch for this, like so?

[Layer 1] CenturyLink Fiber ONT modem/router thing
    -> [Layer 2] 2.5Gb switch
        -> [Layer 3] Orbi router hub 
    -> [Layer 2]  Back to the same 2.5Gb switch
        -> [Layer 3] Everything else (wired Orbi Wifi mesh, some other devices).

I didn’t consider this originally because I was thinking of them as a chain, where the device providing the VLAN tagging would have to ONLY do that. But since that configuration is per-port, this seems like it might work. But I’m a noob, so I need your help.