Hello @mohakmore5ca11
Note:
Reward points are not recommended for use with COD purchases, because receipt of payment cannot be confirmed until after the order is invoiced.
please check with your configuration for the reward points once,
Customers can redeem points toward purchases, based on the conversion rate that you establish between reward points and currency.
Points can be rewarded to customers on the basis of a shopping cart rule. They can be rewarded as the only action of the price rule, or in conjunction with a discount.
Reward point balances can be managed by admin users per customer. If enabled in the storefront, customers can also view the details of their points balance.
please refer below link to set your configurations for Reward points
https://docs.magento.com/user-guide/marketing/reward-point-configure.html
Thank you.
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