Save a PDF of the return and look at the form 1040X ... and when did you mail in the return ? Amended returns are taking 6 months or more to process this year so you have to be patient.
Looking up the return here doesn't require the refund amount ... AND until the return has been entered into the system you will not get a progress report. https://www.irs.gov/filing/wheres-my-amended-return
