https://www.teslarati.com/tesla-massive-order-semi-370-units...
It looks like MAN/Scania combined production last year, including buses, was about 1000.
https://www.sustainabletruckvan.com/traton-scania-man-electr...
Estimates for semi production this year are 5000-15000.
https://sherwood.news/tech/what-we-know-about-teslas-semi-tr...