Yes, you can change your wallet provider at any time: Go to Wallet > Wallet Setting > Change Wallet Provider menu.
However, please note that the private key of the wallet address bound to the portal account must first be imported into the wallet provider you want to change to. Let’s say you are using Metamask and want to change to Coinbase. You first need to export the private key from Metamask app and import it into Coinbase wallet. Then, you can change the wallet provider in Wallet Setting menu.