I cant access the closed beta for space engineers

^ Precisely what Kingvas78 said. Space Engineers didnt leave Steam Early Access until very recently. We have access to Space Engineers as well as their medieval version of it and they are both a blast.

I look forward to Space Engineers dropping on Xbox One to co-op with friends/girlfriend. I'll be sure to stream that so people realize how much fun it is.

That did not work. I went to the insider hub and found the Space Engineers beta but it will not let be download the beta even though I have the pre-order purchased and installed.

Also its is limited space as it is a closed beta

They only announced it for preview members at e3 and would be out later this year they didnt say they were openjng the beta

Betas can cause issues with consoles thats why they cant invite the whole xbox one before it is tested and out for public use (final release not beta)

No release date as of yet, but they did speak at Gamescom this year so I wouldn't be surprised if we see some news soon.

Currently, the developers are trying to decide which system to port it to and (if I remember correctly), the console with the most votes was the Xbox One. They're still in the planning phases, but you can always voice your opinion by contacting them directly.
If they do decide to come to the Xbox One system, they would probably become a part of the ID@Xbox program.