We visited Page in August 2021, and we did the half-day tour of Lower Antelope Canyon and Horseshoe Bend with Tilford (Dineh Tours).
We booked two seats, and, in fact, in the end, it was a private tour.
It was flawless.
The van was really clean, they made available small bags allowed inside the Antelope Canyon, bottled water, and provided hand sanitizer to us.
He also helped with the pictures and the best angles to take them.
We strongly recommend Dineh Tours!