Have you tried MyCadillac "Energy Pass"?

It looks good to me unless Cadillac makes it more expensive than buying direct.

Here is how Ai describes Energy Pass. "The myCadillac Energy Pass simplifies your public charging experience by letting you find, manage, and pay for charging across multiple major networks—such as Tesla Superchargers, IONNA, Electrify America, EVgo, and ChargePoint—through a single account and interface, directly in your Cadillac Mobile App."

I almost always charge at home but if I need to charge elsewhere, maybe Energy Pass is the easiest option and worth it for me.