MetaMask
Open up MetaMask and click the three dots in the top right corner.
Click on Account Details and hit Export private key.
This will then prompt you to enter your password to see your private key.
You can then enter this private key into your Phantom wallet.
Coinbase Wallet
Open up Coinbase Wallet and click on Settings in the bottom right corner.
Scroll down and click Advanced Settings, then click Show private key.
This will then prompt you to enter your password to see your private key.
You can then enter this private key into your Phantom wallet.