Revoking access removes the permission granteded to the DAPP during the Linked Account Creation process.
Revoking access DOES NOT delete the Linked Account from your wallet it only removes the ability of the DAPP to send transaction.
Reestablishing a Linked Account
If you wish to reestablish a connection with thie linked account you can revisit the DAPPS website. The DAPP will treat you as a new user and you will need to follow the Linked Account Creation process again. The only difference is this time no NEW Linked Account is created; instead the DAPP is Linked Back to the existing Linked Account.