How long after bisalp was your first period?

For context, I was on nexplanon for about a decade and very rarely got a period. Then I got a bisalp on 2/14/25 and only on the day of surgery I spotted very lightly, Just enough to show when I wiped and nothing more. Now I'm 3 weeks out but still haven't gotten my period. I'm not worried about pregnancy (obviously) but am curious how long it took others to have a full period post op?