Describe the problem:
Received $15 worth of btc from wife’s wallet.
Says missing purchase history.
Which exchange/wallet is this regarding?
Cake wallet
How did you import data into this wallet?
Manually, Cake doesn’t support
What have you tried to fix this so far?
Changing the tag
If the deposit of the BTC in your own wallet is missing, you should manually add it - How to add transactions manually.
By the way, you can auto-sync your Pancake Swap transactions by syncing your wallet address as explained in How to import data from DeFi protocols like Uniswap, Pancake Swap, etc..