When I did my testing (your post was moved here, to this thread, so you may want to read from the beginning of this thread to see what I’ve been up to when trying to figure out why “Wanda” the marshal has been erratic for me), I removed all my 3rd party airports, regional vehicles, FSLTL, etc. just so I could have a baseline when testing my aircraft for available services. I didn’t uninstall 3rd party aircraft, as they are the ones I felt I wasn’t seeing the marshal with.
This thread is one that I’ve referred back to a few times when trying to figure out my “Where’s Wanda?” issues: