This page of the FUT 22 mode guide in FIFA 22 will tell you when you can claim your Division Rivals rewards.
Division Rivals is one of the online modes in FIFA 22 Ultimate Team. Anyone who has won at least 3 matches in the preceding week is rewarded with the appropriate rewards: packs, coins, and FUT Champions points. By winning matches, you gain points and move up the ranking ladder to higher divisions, which, of course, affects the quality and quantity of rewards. The Division Rivals rewards in FIFA 22 can be claimed each Thursday, around 9 AM CET.
The FUT Rivals rewards can sometimes be a bit delayed due to technical issues. If the rewards are delayed, just be patient - they're bound to come eventually after a while.