@navi @lanodan The mention on the list was my own: https://lists.sr.ht/~sircmpwn/public-inbox/%3Ca31b8cd7-079b-4a7f-b6c5-01d90b5bd08f@app.fastmail.com%3E
I tried to produce a patch but failed miserably. A larger refactor is required. If you want to give it a shot, it would be most appreciated!
scdoc is also missing support for Sx, which allows linking to another section in the page (man pagers merely style the link, but HTML renders will insert the appropriate anchors). This one is less important, but nice to have.