Apple may have next to no stock of the M1 Pro or M1 Max in most markets, but the SoCs remain available to order in Certified Refurbished versions of the MacBook Pro 14 and MacBook Pro 16. Seemingly the only way to pick up an M1 Pro or M1 Max machine before the summer without resorting to secondhand marketplaces, it should be hard to tell a Certified Refurbished model from its brand new equivalent.
https://www.notebookcheck.net/The-Apple-M1-Pro-and-M1-Max-are-still-shipping-in-Certified-Refurbished-versions-of-the-MacBook-Pro-14-and-MacBook-Pro-16.613856.0.html