I’ve been playing with android smart watches since 2020 and they are quite fun gadgets.
I think the R2 should be in that form factor.
These watches do run Android 8.1, 9.0, 10.4 and recently 11.
They support 4G, LTE, WiFi, Bluetooth and more already.
I’m pretty sure that installing the Rabbit OS on these smartwatch is something feasible.
I am currently waiting on a new model that looks like a small R1.
My 2 cents