Yes, but not automatically.
In order to migrate an end-user to an Open Banking (OB) connection, you will need to ask the user to re-authenticate. This is because OB consent flow is done on the bank's side, and TrueLayer doesn’t have access to the end-user credentials, as opposed to the traditional Credential Sharing consent flow.
Once the user consents sharing data through OB, you will get a token which gives you the ability to retrieve financial data for a period of 90 days.
We recommend you store this token, in the same place you were storing the previous CS token and discard the old CS token.
Check out our blog post with all the details about the transition to Open Banking here.