Rescanning will remove any saved transaction keys and destination addresses, which may be useful for proving payments.
If your XMR transaction is still not appearing and the sync state of the wallet is SYNCHRONIZED, then you can rescan by opening the menu in the top-right, tapping Connection and sync, then tapping Rescan.
To rescan your wallet
1
Open the rescan controls
Click hamburger menu
Click Connection and sync
Click rescan
Open the menu in the top-right, tap Connection and sync, then tap Rescan.
2
Choose a restore date or block height and start the rescan
Add restore height
Wait for wallet to sync
Wallet synchronized
Enter a date or a block height from about a week before you created this wallet. For example, if the wallet was created in February 2020 you could use January 31st, 2020 as the "restore from date." Alternatively, use the "Height" shown for your wallet's very first transaction and enter that number as the "Block height."
After entering the date and tapping Rescan, leave the Cake Wallet app open with your phone awake while the wallet rescans the blocks for transactions involving your wallet. When the rescan starts, your transaction history will disappear and your balance will read as 0.0 XMR. As the wallet continues scanning blocks, your transaction history will reappear one transaction at a time. When the rescan is completed, you will see a SYNCHRONIZED label at the top of the balance screen and your entire transaction history and proper balance will be restored.