More than you might think you're missing, and less than you might fear. Your movement vocabulary, musical fluency, cultural literacy, teaching presence, and existing community standing all count for a great deal — none of that goes to waste.
What's specifically missing is the fitness-side formation:
Exercise to Music Level 2 qualification (anatomy, physiology, injury prevention)
CPR and First Aid
Insurance valid for fitness instruction (your existing performance insurance won't cover this)
The CEAT methodology, assessed during Pungra certification
A DBS check, if applicable
Many performing arts teachers complete this pathway faster than instructors starting from scratch, precisely because the cultural and movement foundations are already there.