If it helps...
757/767 rated but started conversion to EASA 737 rating. Finished sim and started line training. Lost medical for 14 months. Medical returned after surgery proved to be a success. 5 sessions in sim and 8 training sectors on line, with same company. Should be back on line next week.
It was easier since I had "737" written on the licence at the end of the sim training.
Good luck.