I have a few Wemo devices that have been obsoleted by Belkin. The lights are zigbee so paired just fine with the sky connect dongle. this is the controller, I pulled the board with the now dumb smarts out and in the base is a nice 3.3v power supply. so printed a separator from the scary voltage, and reused the headers to bring the low voltage up to the esp32. I needed a Bluetooth proxy in the lounge for a few Shelly remotes I picked up.
Yeah that was my original plan, I've got a handful of the tiny seed ones. But the Esphome easy setup for the Bluetooth repeater doesn't support the c3 or anything newer. https://esphome.io/projects/ turns out the length of the esp32 I had matches perfectly the length of the wemo board I ripped out too, so fitted just fine.
It's also nice to use up some of the older boards in my stash. Living in New Zealand I tend to keep a decent supply of parts as they are always time consuming to get. I've got a few too many 8266's left still!