If you're interested in that data, https://www.adsbexchange.com will show it. They also have filters available to only show things like Military or "Interesting" aircraft.
I can confirm it does not show the F15s that routinely fly over my house. But I see business jets all the time, no problem.
Those may be running with their transponder off?
For FR24, commercial bizjets are shown (i.e. those operated for charter). It's only privately owned and operated bizjets that can be hidden if the owner requests it.
I was able to see our state police helicopters a while ago. The state has them marked private now.