Ewww, bluetooth. In all my HA experiences, BT is one of the biggest PITA to do anything with outside of the device’s own ecosystem.
You might be able to shoehorn them into HA using bt-mqtt-gateway if they’re supported. Usually this will mean they need to be a ‘rebranded’ chip like Tuya devices, or generic enough to work with default settings.
I do similar with my Weber iGrill, and plan to do the same with some Xiaomi Flora sensors.
What are they charging for a switch mech?