I am an FI(A) with ppl and theoretical CPL; I am now retired and did my FI(A) with FCL 905 aerobatics estension 15 years ago
I was lucky enough to even remove the restriction during the Jar/EASA transition.
I have been flying for 45 years, having owned advanced aerobatic aircrafts and trained with french world class coaches at huge expense out of passion and desire to improve and learn, and boy have I been and am still studying,mostly aerodynamics and UPRT related subjects just because I love it..
Have done my FI(A) to keep busy during my retirement, teaching PPL, LAPL, UPRT even as a part time activity.
Not having a full ATPL or CPL ( My theoretical CPL expired after 3 years and at the time had no need to completethe flying part) I later realised there are no prospects for being hired, nowhere.
Experience does not seem to interest anybody.
As fly_webby states, there is definitely a role for ppl instructors, but where ? Very frustrating indeed.