Unable to redeem Game Pass Ultimate on Xbox One X

Do you have Xbox Game Pass, or Xbox Game Pass Ultimate? The reason I'm asking you this question is because only Xbox Game Pass Ultimate members get exclusive access to Perks. New content will regularly be available, which you can redeem on your Xbox Series X|S, Xbox One, Xbox Game Pass mobile app, or Xbox app for Windows 10 PC.

Did a bit more digging in the FAQs, no issues at all for existing Game Pass members (direct quote from FAQ):

If you're already an Xbox Live Gold or Xbox Game Pass member, any days remaining in your membership(s) will be converted to Xbox Game Pass Ultimate at a conversion ratio when you redeem the 24-month Xbox Game Pass Ultimate
membership and added to your Ultimate membership up to a maximum of 36 months. Xbox Game Pass Ultimate memberships are limited to 36 months.

If you’re already an Xbox Game Pass Ultimate member, wait until your existing membership has a prepaid balance that is less than 12 months before redeeming the 24-month Xbox Game Pass Ultimate membership through Xbox All
Access. You will be unable to redeem with more than 12 prepaid months of Xbox Game Pass Ultimate.

To check your prepaid balance, go to https://account.microsoft.com/services. Note, once converted to Xbox Game Pass Ultimate, Xbox Live
Gold and other Game Pass memberships cannot be unconverted. Learn more at www.xbox.com/gamepass.

You can add the 24 months of Ultimate to your existing subscription as long as it won't go over 36 months. If it were to go over the 36 months, you would need to wait until you have 12 months or less remaining on your subscription before redeeming the 24
months of Ultimate.

https://www.xbox.com/en-US/xbox-all-access#faq

An Xbox All Access purchase includes 24 months of Xbox Game Pass Ultimate. So, what happens if I have an existing Xbox Game Pass and/or Xbox Live Gold membership when I purchase a console with Xbox All Access?

If you're already an Xbox Live Gold or Xbox Game Pass member, any days remaining in your membership(s) will be converted to Xbox Game Pass Ultimate at a conversion ratio when you redeem the 24-month Xbox Game Pass Ultimate membership and added to your Xbox
Game Pass Ultimate membership up to a maximum of 36 months. Xbox Game Pass Ultimate memberships are limited to 36 months.

If you’re already an Xbox Game Pass Ultimate member, wait until your existing membership has a prepaid balance that is less than 12 months before redeeming the 24-month Ultimate membership through Xbox All Access. You will be unable to redeem with more than
12 prepaid months of Xbox Game Pass Ultimate.

If you are already a Game Pass Ultimate subscriber, then any Gold codes you redeem will be converted to Game Pass Ultimate. If you are not an Xbox Game Pass Ultimate Subscriber, then no, the Gold codes should not convert to Game Pass Ultimate.

Hello @GeoffRobb!

The code does not expire. You can add the 24 months of Ultimate to your existing subscription as long as it won't go over 36 months. If it were to go over the 36 months, you would need to wait until you have 12 months or less remaining on your subscription before redeeming the 24 months of Ultimate.

https://www.xbox.com/en-US/xbox-all-access#faq

An Xbox All Access purchase includes 24 months of Xbox Game Pass Ultimate. So, what happens if I have an existing Xbox Game Pass and/or Xbox Live Gold membership when I purchase a console with Xbox All Access?

If you're already an Xbox Live Gold or Xbox Game Pass member, any days remaining in your membership(s) will be converted to Xbox Game Pass Ultimate at a conversion ratio when you redeem the 24-month Xbox Game Pass Ultimate membership and added to your Xbox Game Pass Ultimate membership up to a maximum of 36 months. Xbox Game Pass Ultimate memberships are limited to 36 months.

If you’re already an Xbox Game Pass Ultimate member, wait until your existing membership has a prepaid balance that is less than 12 months before redeeming the 24-month Ultimate membership through Xbox All Access. You will be unable to redeem with more than 12 prepaid months of Xbox Game Pass Ultimate.