Nope, it isn't.
My Pro1s (still on LineageOS 16 and located in Germany) generally indicate "LTE" or "LTE+", which are different variants of the LTE protocol. In areas where network coverage is bad, my phones drop to "EDGE" (2G, still available in Germany). You are supposed to be able to somewhat influence the protocol switching behaviour using the "Preferred network type" system setting, but I've never seen much effect while playing with this. For practical purposes, "4G", "LTE", and "LTE+" are pretty much equivalent, and indicate the Pro1 is operating at the fastest protocol family it