YES.. You CAN Play SOME Optimized Series X
This is what Optimized for Xbox Series X means. Keep in mind that
Halo: The Master Chief Collection is getting optimized for Xbox
BrightOn Optimized Cable Package Compatible with XBOX Series X/S. Contains 3 cables. Each cable has a length of 2 meters. Achieve optimized connections between your network, your display and your controllers with the BrightOn optimized cable set for your new XBOX controller. Your gaming experience can be greatly improved with a professional cable package from BrightOn specifically designed for your console.
Brighton Optimized Cable Package Compatible with Xbox Series X/S | 8K HDMI 2.1 HDR Black Cable 8K@60Hz/4K@120Hz | Cat 7 Super High Speed Ethernet
Starfield Xbox Series X Gameplay Review [Near Perfect] [Optimized
30 Games to be Fully Optimized for Xbox Series X and S at Launch
Inside Xbox Series XS Optimized: Rogue Company - Xbox Wire
Can you play optimized games on external hard drive on Xbox Series
Optimized for Series X, S
Some Xbox Series Optimized games CAN run on external drives : r
How to Use a PS4 Controller on Xbox Series X or S