While spelunking around for a different topic (VFRMAP for VR - #7 by fearlessfrog) it occurred to me I should pass on the nice OpenAIP thermals data feed they do here -
https://openaip.github.io/api-v2-docs/#/Hotspots/get_hotspots
It seems to be a free to use and open dataset of thermal hotspots for gliders, so passing on in-case it’s useful for any MSFS plugin. It might already used, so apologies if not useful or already used.
The data seems to be from here: openAIP - Worldwide Aviation Database
…with a map display (thermals shown as cloud in orange/red):