https://learn.microsoft.com/en-us/visualstudio/ide/how-to-save-and-open-files-with-encoding?view=vs-2022#set-the-default-encoding

Starting in Visual Studio 2022 version 17.13 Preview 1, you can set the default encoding for saving files.

To set the default, choose Tools > Options > Environment, Documents. Next, select Save files with the following encoding, and then select the encoding you want as the default.