How can I disconnect my Google and Apple Account from Twitter?

Open your twitter’s Setting & Privacy page after logging into your profile. In the Account tab on the left-hand side menu, find the email address field where you can see your gmail address listed as registered email. Replace that with another email address you have and follow the verification step to confirm you want to use the new address as registered email. You have now successfully disconnected your Gmail from your Twitter. 

When you remove an account from the Twitter app, you have effectively logged out. Removing the account from the app does not delete the account. You can always add the account back later by using the Log in button. 

It's important to note that Twitter retains user data for 30 days after deactivation, during which the account can be reactivated. After this period, the account is permanently deleted.