January Xbox Quest Reward issue

I have since received the xbox quest reward for January, but not the game pass quest reward for January

Since that's part of Xbox Quests and not the Rewards program, Rewards support will not be able to assist. Keep in mind that prizes from quests are given within the following month. So if that is the quest for December, you will receive the prizes in January.
If you don't receive anything by the end of January, you will need to post in the sales and promotions forum.

Hello Baldwin1337,

This forum is for Xbox Live Rewards issues only. If you are asking about a general Xbox promotion, you should try reaching out on the general Sales and Promotions forum for more specific assistance.

For help with quests, you'll need to post in the sales and promotions forum.

Hey Alpha1Apex! Thanks for letting us know, and for your patience while we looked into your eligibility for those rewards.

Xbox Quest rewards are delivered within a month after the quests have ended; you should see any rewards for the February quest by the end of March.

As for your December and January quest rewards, please check your Xbox Live messages for more information regarding those.