To have the Arc backup icon appear with Sonoma and Bartender 5, it nows needs a script trigger. It took a little bit, and I have the Arc icon only appearing when a backup is running. Here is a gist for the script.
After messing with a chain of different products to control lamps and lights, have finally picked up a Lutron Caseta system. It is so much better than everything else I’ve tried. It definitely cost more than all the others, but then it actually works. Turns out that extra cost is totally worth it.