It seems that hugo does not support @use in scss yet. Is there an estimate of when it will? The last post on hugo discourse about this was in 2019 so I would hope that things have changed/will change soon?
[scss is phasing out @import in the next few years and @use has been around for a while now.]
Note that you’ll need to install Embedded Dart Sass in both your local PATH and the host’s PATH. I wrote a couple of posts about how to go about that (and there are links therein to earlier posts on the subject):