Why cant i find any xbox series X in any store or on line?

Because even if we weren’t in the middle of a global pandemic, they can only make so many units, shortages are common Console launches in the best of times. When the PlayStation one came out they had exactly one loose console to sell, and that was the
last time I saw one on launch day. Retailers will be announcing future availability as events warrant

because it is sold out everywhere

Due to the UK lockdown store's will be closed....

I can't find any info on any UK store's opening at midnight for Xbox Series X/S

However, GAME.CO.UK high street store's will open on Tuesday 8am to 2pm just only for the people who have in store pre-orders, to get and pick up their Xbox Series X/S.

Having checked to see if I can find the game on the stores. The only version I could find was for the Xbox One and Series X|S consoles. The game might only be available for the console, and that could be the version you got from the Microsoft Store and the Xbox Store. Hence, why you cannot find it on your PC Library.

I don´t see there any problems. The Xbox One X works great on a none 4K TV too. So why should it be any different with the Series X?