You may have withdrawn wBTC to your wallet, and noticed that the USD Value is less than you expected.
This is due to a strange bug in MetaMask, which for some reason only displays wBTC to 3 decimal places, when in fact it has 8.
So in the above example, it shows I have 0.004 wBTC, with a value of $224.86
However, if I check Etherscan, it shows the full 0.00454924 wBTC with a value of $256.32.
If you're not sure how to see your balance on Etherscan, first click on the wBTC token in MetaMask, then click the three dots, then View on Etherscan.