FFDOs aren't LEOs. The have limited authority to act. On a plane.
The TSA considers them LEOs for the the purpose of TSA's internal procedures in clearing them up the exit lane (i.e. LEOFA)-- is that what you are trying to say?
Yes, indeed, they have limited authority to act. On a plane. But that authority is granted to them as LEO's They also have authority to possess and transport firearms in accordance with TSA regulations but regardless of state law restrictions. In order to exercise their authority, limited as it may be, they are, in fact, deputized LEO's. As is the case with every U.S. LEO, they have agency restrictions and regulations as to extent of authority, conduct etc. Their restrictions and regulations happen to give them no arrest authority and limit their jurisdiction to the cockpit.
And, yes, they are LEO's for the clearing via exit lane process.