Seems It was actually 2024.6.1 that introduced the change. Not sure where in this release notes it said it was a breaking change, but
I’m all turned around. I updated the main post with the link to the PR and I had the right version from the get-go.
I don’t know this for sure, but if you installed the mobile companion app thru the Store for your platform, then the integration is probably using its push API to reach your device remotely.
I’m >90% sure notification workflows find me even when I am remote and untethered from home when I notify the app on my mobile devices.