My COVID project was DCSkyCam[1], which is on a Pi4 with the HQ camera to do sunrises/sunsets, and uses TFLite and other packages for object detection and identification of helicopters that fly by.
I also have a Pi 3B running pihole[2] and running custom scrape jobs to alert me of certain website updates, which I’d like to transition to using selenium but the 3B is too slow for chromedriver - might upgrade to a Pi 5 if I can.
[1] https://dcskycam.net [2] https://pi-hole.net/