Just for your information @OlieTsubasa443
After the next reload of Steam and MSFS I did see (much) more content in the content manager. Appeared to be various planes, airports and landing challenges. All Standard Content and everything already installed. No option to download anything regarding premium.
But at least something changed. Will try again a couple of times.
Its an update that comes when you launch. If Iām not wrong.
My Install is PC/MS Store:
In content manager I show "Space Used: 100.53GIB
I also show 110 Result(s) found.
I have the Cessna 172 steam version. I think that only comes with the premium deluxe editionā¦not sure.
My download started with a freeze and would not continue.
I used the windows APP manager to Uninstall MSFS then went to the store and started another download. That download completed without interruption.
More later if I find something odd.
Solved. I rebooted the simulator and the update appeared. Thank you
have the same problem on the XBox Game Pass
All is good on my end now. Thank you!
Just wanted to report itās fixed on the Steam version for me.
actually i could access the De Luxe version but cannot buy and download the upgrade to the Premium
I also have the deluxe , but i only have 19 planes.
In the core content Manager itās stating : core content mandatory pack ā¦ relaunch the game to update ;ā¦ but after the 30e time i gave up 
Also i canāt check the button in front of it.
I see Steam Deluxe Content as Purchased and Installed on Marktplace, when I go to the Content Manager I find 100 items, but I donāt see Bhutan Download to download !! I enter the hangar and the aircraft are not !!
any correction?
I can find the selected content in the content manager, but when selected, I donāt have the option to install it. Paid an extra $60 for content I canāt use. 
No deluxe content for me too. tried everything that was suggested
Hello PabloLeChuck,
Please check again, the issue should be fixed for everyone by now.
Please logout and login to see the content again.
Hello Olie, I was using game pass until I bought the deluxe version (the full version of the game, not the game pass upgrade). Then I cancelled my game pass subscription. Inside the content manager, the content was showing (and was downloaded) but I couldnāt see any information clicking the buttons that are below the list (I think they are named āVersionsā and āDependenciesā). That information was empty and there was no way to delete the content.
I had to reinstall everything, and even then it didnāt work at first. Had to quit the sim and start again.
Honestly (and everyone know this) the installation and the experience of DLC is subpar. There should be no need to download 90gb again (after my initial 90gb installation), considering how my monthly cap is right now.
Thanks for your help and have a nice day.
Logged out and logged back in again. Still no premium deluxe bundle content, and no extra content Iāve bought in game, like the Carenado C182T. Any other suggestions? I tried uninstalling and re-installing for a third time, but still nothing. Only 20 planes.
(Edit) Just checked again. It is working now. Thank you!
I had the same problem. Reinstalled, filed ticket, etc. Today, itās there.
I fired up the sim, it wasnāt on the map. I went into the marketplace, saw the packages were installed, logged out, restarted the sim, and all the content is now working.
Donāt know what happened, but Iām glad itās in there finally.