When does IRS update "Amended Return Status" website?

I've sent in my Amended Return on 1040x about 8 weeks ago (and they received my certified mail), but there is still nothing when I search on https://sa.www4.irs.gov/wmar/.
The Dashboard (https://www.irs.gov/help/processing-status-for-tax-forms) Says they're still processing 1040 based forms from the month before, so perhaps they just haven't gotten to it yet?
Seems like there would be some update on the Amended Return Status page tho?