According to FM Scout there is one 5 star defensive coach in the entire game, who is a scout IRL.
There are zero 5 star attacking coaches and one coach who gets 5 stars for possession but is actually a goalkeeping coach IRL.
There is an actual 5 star GK coach though, and a handful of fitness coaches, but yeah, yet another area of the game that desperately needs improved and has done for at least a decade.