Hi there,
I get why you’re worried, but I wouldn’t judge it too much on day one. Right after surgery it can look like the actual number is less than the number they told you, especially with blood, swelling, scabs and the way the grafts are spaced out. Also remember that one graft is not the same as one hair, so visually judging the number right after surgery can be misleading.
To be fair though, confirming the exact number after the surgery is not that easy. The best proof would have been during the procedure itself, either by asking them how they were counting the grafts in real time, or seeing the grafts sorted and counted in the petri dishes before implantation.
What I’d do now is ask the clinic if they took any photos or videos of the grafts before they were implanted. This may help you. But overall, day one really isn’t the best time to judge the graft count or the final density. Just give it some time and hopefully everything will be great.