For those not in the US: it may be covered, but normally it’s a separate insurance plan and not covered by your regular health insurance.
It also varies what type of “dental” care. Some mouth/gum surgeries may be covered by the health plan. I think most dental plans cover checkups. All this varies wildly with your employer and insurance election, though.
Try turning the phone to landscape mode before tapping the full screen button. It works for me in YouTube on Pixel 7a.