Cool :) I have done my bachelor's project around wifi location fingerprinting back in the day. Took a year but with a bit of tweaks we did manage to calculate pretty accurate models of signal propagation by just having a wall model. The only downside at that time was the lack of development tools for Android (we had to use netbeans which was being horrifying experience). I guess it would be a lot easier to do the project with modern development environments + Flutter & Dart and using a bit more modern versions of OS :)

Really nice to see that this area is still active and being worked on!