I worked for a mobile network company a few years ago, the vibe I got there was that 5G penetration was still years away and that none of the providers were anywhere near ready for it.

Interestingly that company built a bridge of sorts allowing providers to get more life out of their older hard and software, converting e.g. 5G signals to 4G and 4G to 3G (where a signal is for example a phone phoning home telling the provider they used a megabyte of data, or looking up the IP address when calling a phone number)

Also where 2/3/4G network signals were all their own protocols (RADIUS and DIAMETER), 5G is just HTTP. And where for the 3G/4G stuff they had to write their own code to handle the protocols, for the 5G stuff they just used the cURL library. That is, cURL powers 5G networks.