So firstly, thank you for this. I believe your advice has cleared up 2/3s of my current issues and advanced the troubleshooting on the third. Fully removing and re-adding (rather than just resetting and re-adding without removing from the app) the switch in the Switch/Bulb pair and the motion sensor in the Sensor/Bulb pair got them working again.
No luck still on the Switch/Plug combo, even after fully removing and re-adding both the Switch and Plug. But I did some additional testing and I don’t believe the problem is the switch specifically, as it can control other devices that show up in the Smart mode “single press” devices list, like other bulbs in my house. I did realize that only “Single Press” actions (and probably double-press, button hold etc. actions but didn’t test those specifically) show up in the Automations History. If I set up a standard Automation (so not through the Switch settings page for Single-press actions) for controlling anything from the switch turning on / off, nothing ever happens and no entries show up in the automations trigger history. So my current suspicion is that Automations for the Switch are broken in some way (since this failure happens on all of my switches, including one that has not had any issues at all) and only actions specified in the Switch settings page for single-press actions actually work, combined with (I’m guessing) that at some point the list of devices that could be controlled through that page was reduced to only lights and I never noticed until now when I had an issue. I’m guessing this happened to ”simplify“ things for basic users since they would likely only be controlling lights anyway and move control of everything else (as is advertised on the project page, compatibility with the whole Wyze ecosystem) to Automations. Since I removed the Plug from the single press actions during my troubleshooting, and with Automations non-functional for Switches entirely it’s currently completely broken, which stinks because the combination of a Switch in Smart mode (which keeps the connected outlet permanently powered) and a Plug elsewhere in the room was very convenient for rooms with outlets I didn’t want to connect a lamp to.
My guess is my only current alternative to this would be to replace all the bulbs in the lamp with Wyze bulbs, which, no thanks, it’s a 5 bulb lamp and these Automations are supposed to work as far as I can tell.