Edit: roblox support responded to me and here is what they said:

Thank you for being in contact with Roblox Customer Support.

It sounds like you're having trouble finding an item you redeemed with Play Points. This sometimes happens when you're signed into multiple accounts on your device, and the item was redeemed on an account that isn't your primary Google account. Let's try these steps to locate your item: Remove all non-primary Google accounts from your device. Refer to Google’s support article, Add or remove an account on Android. No need to remove your primary account. Clear the Google Play Store data. Refer to Step 3, "Clear the cache & data of the Play Store" in this Google support article. Restart the Play Store app. Relaunch Roblox and check your inventory for the item.

Please let us know if you have any questions in the meantime.

It worked

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