Hello! Good question regarding when can I expect my refund after filing an amendment.
Per the link below, Your amended return will take up to 3 weeks after you mailed it to show up on our system. Processing it can take up to 16 weeks.
Here the link with additional info about amended return and refund processing.
https://www.irs.gov/filing/wheres-my-amended-return
Hope this helps! If not reach out to connect again for additional information!