It varies in different parts of the world. Here in New Zealand all except one fixed line (i.e. fibre/xDSL) provider offers IPv6 (the only hold out being the ex-government telco). Wireless/mobile (4G/5G mobile or FWA) is a different story however as all wireless/mobile networks are IPv4 only still to this day (even thogh two of them are also fixed line providers offering IPv6 via their fixed line service!).