node-sass package is deprecated and currently won't even build with Node 18 (support coming). They recommend switching to Dart Sass / the sass NPM package, which is a purely JS implementation.

As this currently hinders even building BudgetBudget, I think it'd be wise to follow this recommendation, node-sass will probably always be slower to support new versions and probably EOL some time in the future.

By the way: Have you lost interest in this project? The last activity being in November and features I want missing was the reason I cloned and tried building this in the first time, to see if my limited JS skills are enough to get myself familiarized with the code and start doing stuff myself..