Yes, but without a look-down shoot-down RADAR the FRS1 wasn’t going to sit at FL nosebleed to detect targets - you could probably fly with the window open!
This was what kicked off this whole affair - a new beard wearer in a Typhoon started feeling a bit squiffy at FL nosebleed and it was deduced that his beard was the issue by the Squippers. The new, temporary, guidance followed shortly after with an expectation for a scientific qualification that beards should be safe, but until that is done by RAFCAM then it is time to go clean shaven for a bit. I also hear rumour that the poorly pilot had been putting some odd concoction on his face fungous that may well have caused the issue - although that is rumour (this is a rumour network, right?).