bib2gls application FAQ
No, it’s not possible to apply a different sort method to different hierarchical levels in the same glossary within the same resource set. Although it’s possible to sort blocks differently through the use of multiple resource commands (as demonstrated in Custom Group Blocks) it’s not possible to divide the hierarchy across multiple resource sets as that would separate the child entries from their parents.
However it is possible to create the effect of a hierarchical glossary with differently sorted levels through the use of inner nested glossaries. See the Inner or Nested Glossaries page in the gallery or the sample-nested.tex sample document described in the “Examples” chapter of the bib2gls user manual (PDF).
Alternative link: https://www.dickimaw-books.com/faq.php?itemlabel=sort-nestedglossaries