Need to be aware though that only aircraft equipped with (and using) a mode S or ADS -B transmitter can show on FR24. Even then they have to be in reach (range) of a hobbyist with a reciever. I have one but due ro moving house recently it is in a box.
Many older aircraft do not have Mode S or ADS-B nor do many of the lighter aircraft as it s not (yet) a requirement in uncontrolled airspace.
It is now a requirement to have this fitted and operating within controlled airspace, but we should not be flying in controlled airspace without permission I guess.
That said, many light aircraft are now fitted and more will be fitted as it becomes a requirement and so it will provide some information to us drone pilots, but it will not show everything. Well not yet.