Hair lost during crust removal. Is this normal?

If you didn't get a satisfactory answer, ask again until you get an answer by your doctor.  It is normal to lose hairs after surgery.  It is normal to lose hairs with scabs.  Sometimes you can lose grafts as well if you're not careful.  The is no way to tell unless you have an examination.  Everything else is basically guess work.

It is not unusual to lose several grafts as the crusts loosen up, but losing 200 would be unusual. Follow up with your hair transplant specialist to express your concerns

This could be normal fall out as it is within the timeline.  This sounds like a very large case and in such a situation you may want to go in for a follow up exam.

If you actually pulled off the crusts, the you likely pulled out the grafts. Crust should never be pulled off, they should shed with the various daily washes. An FUE is treated just
like a regular hair transplant with regard to the recipient area, but the donor
area has open wounds which require daily washing with soap and water. Within 3
days of surgery, you can resume full activities, heavy exercises if you wish.
The recipient area requires daily washes as well to keep the recipient area
free of crusts. I generally recommend the use of a sponge and supply my patient
with a surgical sponge to fill with soapy water and press on the recipient area
daily. By repeating this daily, all crusts can be washed off without any fear
of losing grafts. IF any crust are present, use a Q tip and dip it into soapy
water, and roll it on the crusts and that will lift them off without dislodging
them, but never rub them, just roll the Q tip on the recipient crust. I like to
see no evidence of any crusting in the recipient area and the crusts from the
donor area gone in 7-10 days with daily washing,.

The hair shaft falls off with the scabs but the follicles remain under the skin. the hair goes through its own intrinsic growth cycle. The transplanted hair usually starts to grow in after three months and will continue to grow for up to 18 months after the procedure.