Browser used by office add-ins on Windows Server

https://docs.microsoft.com/en-us/office/dev/add-ins/concepts/browsers-used-by-office-web-add-ins

The above URL specifies quite clearly which Microsoft browser is used for office add-ins for various operating systems. However, Windows server is not mentioned anywhere in the list.

My question is this: Which browser is used for the different Windows Server versions (2012, 2016, 2019), and under which circumstances? Our plug-in has code that will not run in IE11, and we are updating our system requirements for our users with supported operating system versions.

Thank you for your help!