Hetzner sells v6 only dedicated servers, you have to pay a little extra for a v4 address now. So yeah, I'd consider it pretty common.
I have a weather station I run on T-Mobile which is v6only with a ipv4 CGNAT. I just Cloudflare the v6 endpoint and my legacy (v4) users can visit the station.
I have a weather station I run on T-Mobile which is v6only with a ipv4 CGNAT. I just Cloudflare the v6 endpoint and my legacy (v4) users can visit the station.