If this is the only issue, you can approve the access request through approval administration.
If this will be an issue going further then please review below from Sailpoint documentation:-
You can optionally enable automatic approval when the configured reviewer is the requester identity. This setting requires an API call with the Update Access Request Configuration endpoint.
Automatic approval only applies when the configured reviewer is an identity.
If the configured reviewer is a governance group, even if the requester is the only member, automatic approval does not apply.
All other configured review levels still apply.
Auto-approval events are detected and audited at the start of a review sequence. Audit logs show auto-approval events even if a request denial by another reviewer ends the review process before the auto-approval would occur.