How do I download SiriusXM on my Apple Watch?

I have an Apple Watch Series 8 updated with version 11.2 and I just subscribed to serius XM with service on 2 vehicles and 2 downloads. I have the app in my iPhone but the other download I want on my watch which has it own cellular service? With my Bluetooth headphones I want to listen while I run, without taking my phone with me.

[Re-Titled by Moderator]