I'm a huge aviation nerd and super curious about the impact of covid on that market. I've built a website that tracks which aircraft type flew where over the last days and what the average number of flights per day for that type is and was:
It already works well, but there's still a lot to do, like showing aircraft routes on a map. The overall data provides a nice trend that is statistically stable, but since free aircraft data is hard to come by, coverage of regions that are not Europe or North America is not that great unfortunately.