(Only due to your comment did I realise I was ambiguous, I meant remote work specifically for the IT department would be mandatory, not everyone in general).
It could still be office-based though, sure technically remote from the server, but so are the web servers software engineers develop for typically, sometimes even their development environment is. I don't think that really factors into remote (WFH) vs office working at all, at least from an employer's perspective. Maybe it makes it easier to work remotely, but certainly doesn't necessitate it: you can work from anywhere, and that can still be the office.
(Only due to your comment did I realise I was ambiguous, I meant remote work specifically for the IT department would be mandatory, not everyone in general).