Looks like the Surface Studio was forgotten (all models). A short while ago, I came across an article from PCWorld that had a list given to them by Microsoft of compatible older Surface models.
The oldest model getting the Windows 11 upgrade is the Surface Book 2 released in November 2017, though this is only the case if the device is powered by 8th Gen Intel Core processors. If your Surface Book 2 comes with an Intel Core i5-7300 chip, then you won’t get the Windows 11 upgrade.
Here’s the full list of Surface models getting the upgrade:
- Surface Book 3 (May 2020)
- Surface Book 2 (Nov. 2017)
- Surface Go 2 (May 2020)
- Surface Laptop 4 13.5” (Apr. 2021)
- Surface Laptop 4 15” (Apr. 2021)
- Surface Laptop 3 13.5” (Oct. 2019)
- Surface Laptop 3 15” (Oct. 2019)
- Surface Laptop 2 (Oct. 2018)
- Surface Laptop Go (Oct. 2020)
- Surface Pro 7+ (Feb. 2021)
- Surface Pro 7 (Oct. 2019)
- Surface Pro 6 (Oct. 2018)
- Surface Pro X (Nov. 2019)