MD
I don't see why not. Indeed I would have thought that the Medical Branch would welcome your daughter if allready partially trained/indoctrinated for full-time Service life. Many have been Air Cadets, UAS Cadets, RAuxAF or RAFVR(T) before they join the Regulars.
She should speak to her local RAF Careers office, when ready, to get professional advice rather than our amateur mumblings on here though.
Best of luck to her.
LJ