I have had IPv6 for a long time. Works fine for me.
APN settings possibly?
Oh, for mobility? My bad. I thought it was for fibre/DSL. Cellular is still IPv4 for me. Haven't had any issues accessing anything though. What are you doing that requires IPv6?
There are a few services I connect to that are IPv6 only which I can live without, but would be nice if TELUS embraced IPv6 on the mobility side.
IPv6 is important for me because my home internet does not fully support IPv4 (CGNAT only) so if I want to remote access anything in my house, I need a routable v6 address.