I used this same website some time back for my ivermectin prescription.
I used a telemed doctor by the name of Dr. Michelle Morholt, she’s in Washington State, I live in Florida, I used the original prescription and then got a refill just in case.
Depending on your state, she may not operate there, but they have a bunch of listed doctors, check for one in your area. Given how widespread Omicron appears to be, it might be difficult to find one with open prescriptions .