We were there in June and they were, but you have to stop by their (Covid 19 ) office and make your own appointment. Go about 1 pm - they do close for lunch - when the wait is not too bad. You have to wear a mask. Have fun
Per TTR's website, they are offering antigen tests: Temptation Cancun Resort | Sexy & Sanitized | Temptation Experience
The nasal swab...tip them beforehand and ask them to be gentle. If you can get the female tester, I understand she's not as harsh! I tipped the guy $5 and made sure he saw me put it in the jar...he was counting down from 6, I winced at 4, and he said we were done.
I get tested once per week for over 1 year at work and the test at the resort hands down was the worst I have ever had. But the discomfort was temporary.