Yes! The Bestop Supertop for Truck Collapsible Bed Cover # B7632435 will work with the Tinted Window Kit for Bestop Supertop for Truck # B76308 on your 2021 Toyota Tacoma (5-foot bed).
As far as the tints, you will still be able to see out of them, but it will be considerably darker during the day and at night. I went ahead and attached a photo of the tinted windows used on a Jeep. Note the difference between the front non-tinted windows and the tints on the rear window kit. view full answer...