"POS total sales by staff member" report is COMPLETELY BUGGED / BROKEN
Edit: If you're after the non-broken report, you can't find it via the UI anymore, but you can access it directly here (I managed to find a direct link to it in the old docs, which thankfully wasn't updated):
https://admin.shopify.com/reports/retail_sales_by_staff_attributed_to_sale
We have "Manually attribute sales to staff enabled" and it shows on the POS but the corresponding report is completely broken since the update (https://help.shopify.com/en/manual/reports-and-analytics/shopify-reports/new-analytics/analytics-upd...). It now only shows the logged in user and you cannot find the attribution anymore!
Here's what the report is supposed to look like (note where says 9 results), instead of only 1:
