>>106589889
upd: treesit-fold with this
(push
'(string . treesit-fold-range-seq)
(alist-get 'emacs-lisp-mode treesit-fold-range-alist))

seems to be enough, at least m-x treesit-fold-toggle works as intended. obv this is for all strings, but i don't care, i'm not folding anything else.