If a project is pinned to a package that requires dart-sass you can suppress deprecation warnings with

@use "sass:warn"
@include warn.deprecation;

If you must, pin to 1.77.6 which does not throw warnings

npm i -D sass@1.77.6 --save-exact

References:

  • https://stackoverflow.com/questions/67675422/deprecation-warning-in-bootstrap-scss