I am having this exact same issue! I've tried all of these things and still nothing.
I've found no way of contacting support either, can't seem to find anyway to fix this.
The best way is click support and then click on the platform. As for me everything they told me to do I am still unable to load any saves after the new update. I've done everything and after talking with Microsoft they have confirmed this is on CDPR end. We did alot of troubleshoot steps and nothing worked.
As I said in another topic my Cyberpunk2077 on my Ps5 runs great. I was also able to get phantom liberty free from my Fiance

and it runs great I can save and load those saves like normal. So I concluded something they did really messed up saves for Xbox series x badly and Microsoft also confirmed they have reports of this issue and with Cyberpunk2077.
I am disappointed because the expansion is awesome but this BS right here can just make you think wtf are they doing over there. The holidays are coming up and are they going to fix this crap??. It's honestly a damn shame and I'm glad I didn't have to pay for the expansion on my Ps5 lol lol they are not getting a cent from me until they get there ish together.