Thanks for the replies. Interesting.
Aside from obvious issues with GPWS cautions, ‘gates’ and minima, I can’t see anything to prohibit being high at the FAF, much as you might capture a glide from above.
Obviously nobody plans to be high at the FAF, but it can happen due to ATC or environmental factors. Airmanship involves avoiding such events but presumably also safe recovery, which doesn’t always mean flying a missed approach.