[5G+ 5G- etc.]
Please, do not conflate 5G with "mmwave" technology, there's no need to invent special terminology (after all, we are on a technical forum).
5G, initially defined for the Radio Access Technology (5G NR - new radio) in 3GPP Release 15 (2017 IIRC), uses a number of frequency bands.
Many bands overlap/are the same as previous technologies, then there is FR2 "Frequency range 2" with bands ~24 to ~52 GHz, mmwave.
In Europe, as an example, some countries are freeing bands currently used by DVB in the 700 MHz range for 5G deployments.
The changes in 5G are in the modulation - not a great technology leap, still OFDM (orthogonal frequency-division multiplexing) as in 4G - which has been optimized and in many other RAT related details, allowing for lower latencies, higher throughput, special use cases etc.
So much so that the radio HW of many vendors can be upgraded to 5G "just" with a SW update, some vendors' radio can even multiplex 4G and 5G in the same spectrum with tens of ms granularity, to serve different generations user equipments.
Of course, the ultra high speeds can only be achieved in the higher bands and it must be said that the USA is, as of my last check, the country where most of the mmwave deployment is being done.