I don't think it is particularly difficult or complex, as other users have pointed out the implementation is quite straight forward even with off the shelf equipment. The question is when will the UAV be used? If during battle it will be forcing the commander to focus on multiple things at once, doubly so if the enemy has anti UAV capabilities. If not during battle, then why not someone else?
VTOL capable UAVs rarely have batteries that last longer than one hour, while non VTOL UAVs are going to complicate recovery. If used during battle returning the UAV could reveal the location of the tank, while non VTOL UAVs will require the crew to be in the open for recovery. Unless of course they are disposable.
For starters it will be useful to scout out a location for anti-tank assets before sending armor in! The reason tanks have been sitting ducks in Ukraine is that they have very poor situational awareness.