Back in 2018, we mentioned Verizon would be supporting RCS messaging beginning the following year. The carrier did offer RCS. RCS messaging features were soon made available on Verizon Pixel phones and more. Fast forward to 2021, Verizon is making RCS default with Messages by Google for Android. This means now that all three major carriers in the US have RCS ready.
Link: Messages by Google for Android default for RCS on Verizon