Some Hebrew fonts provide a just feature which substitute some letters with a wider version. This was historically used to help justification, and although not commonly used today it will be a nice feature to have. The common letters with wide variants are aleph, dalet, he, kaf, lamed, final mem, resh and tav, you can find the wide variant in the Alphabetic Presentation Forms block. The implementation should be similar to how it is done for Arabic (maybe with some configuration to which characters should be elongated).
\documentclass{article}
\usepackage{fontspec}
\setmainfont[Script=Hebrew,Renderer=HarfBuzz]{NachlieliCLM}
\begin{document}
אדהכלםרת
\addfontfeature{RawFeature={+jalt}}
אדהכלםרת
\end{document}
Some Hebrew fonts provide a just feature which substitute some letters with a wider version. This was historically used to help justification, and although not commonly used today it will be a nice feature to have. The common letters with wide variants are aleph, dalet, he, kaf, lamed, final mem, resh and tav, you can find the wide variant in the Alphabetic Presentation Forms block. The implementation should be similar to how it is done for Arabic (maybe with some configuration to which characters should be elongated).