Change default text encoding in Excel 2019?

How can I change the default text encoding in Excel 2019?

I already tried this hack/workaround https://superuser.com/a/1179248/1468612
but sadly it seems to not be working for Excel 2019.

My standard encoding is windows-1252 but I have to work with
windows-1251 files a lot recently.

I am working with dozens of external Excel files each day so doing it for every single file is not a solution. It is driving me insane.