When I look this up it seems like if the carrier offers RCS (which you do) they just need to allow it. Please?
Hey @SpinDr1ft, you should be able to enable RCS using latest Google Messages version on your Android device. Just note that when enabling RCS for the first time on the device, you will be prompted to accept Google Terms of Services before turning on chat features in the Messages app. For more info, please check TELUS support page here: https://www.telus.com/en/bc/support/article/android-next-gen-messaging-explained
Hope that helps.
I have 4 different OnePlus phones (OOS and LineageOS) and they all have RCS working with TELUS.