Redeeming Xbox gift card from Microsoft rewards

If you have enough Microsoft reward points, then you need to redeem the reward points for Xbox/Microsoft Gift Cards on the redeem page of Microsoft rewards. Then once the gift card codes have been emailed to you, then you can redeem those gift card codes on https://account.microsoft.com/billing/redeem Once you have enough money from the Xbox Gift Cards, you can then purchase Minecraft from the Microsoft Store or Xbox Store (depending on which version you want).

For help with the Microsoft Rewards program, you would need to contact their customer support via their redemption page. Rewards points can only be used to redeem gift cards through the Rewards program, not to be used to make purchases on Live. You would
need to save up enough to redeem an Xbox gift card and then use the money from that gift card.

Sorry I meant nothing came back and I tried to redeem a 10 dollar Xbox gift card from Microsoft rewards on Xbox and have tried to redeem a month game pass membership from Microsoft rewards also

Once you redeem a gift card from Microsoft Rewards, you cannot turn it back into Rewards points.

Xbox Rewards credits cannot be redeemed towards a Microsoft store gift card. You may be referring the Microsoft Rewards program which can be redeemed towards gift cards. You would need to contact their customer support via their redemption page.