Bluetooth presence

I’m aware there are a few bluetooth tracking integrations here, but I haven’t quite made sense of how they would work. (New to HA) However, I’m trying to find a “simple” way to use an existing bluetooth device for presence detection. I know that often you need a particular manufacturers app to be able to find these devices. However, I’ve noticed that the Unifi app Wifiman has a bluetooth scanner that seems to pick up just about everything. I’ve managed to identify a few items just by watching the signal strength change with proximity in combination with whatever identifying info the app can pull (eg it knows which items are Tiles, which are Apple devices , etc).

But I haven’t figured out a way to get that info out of an app like Wifiman or to have something similar running on a windows machine or RPi with a bluetooth adapter - and into HA in some way. Perhaps the existing integrations already do this.

Pointers would be appreciated!