Well, AFAIK most telecoms are either doing spectrum sharing or still keeping majority of spectrum on 4G. M-MIMO not deployed as widely as expected, and 5G SA has barely started.

COVID along with Huawei ban and other national security concerns have at least delayed most plan by 2 years minimum.

So while most would have expected 5G to have a much quicker roll out than 4G, those reasons above make current 5G about the same stage of previous 4G.

I sometimes think if it would be better they craft out a subset of 5.9G with along with some efficiency improvement and then brand it as 6G instead.