Heal up!
Some body weight lower body workouts can be … squats, lunges, reverse lunges, good mornings (for low back mobility and glute activation), step ups, side lunges and many more. Try picking 3-4 different moves about 15-20 reps (body weight) then switch up the exercises you pick after a 3 weeks to a month. I’m not a sports exercise physiologist but I know a few things about gym work and being broke off for some time.
Listen to the doctor but I’ve always been told make sure to eat enough when broken off, helps the body repair. Before you know it you’ll be back hammering it outside! Being injured sucks, feel better
Try and get comfortable on the turbo and use that to train. I wouldn’t worry if you can’t hit specific numbers due to your position, just do what you can.