Ask HN: What tools do you use to create project's public roadmap?

I am tasked with presenting the outline of the future of the project's development to the CEO so I want to leave a rather good impression and also make room for discussion in regards to what was outlined.

I'm not talking about kanban boards or "issue spreadsheets" (the new github projects feature), but more of something that you could show to the board of the directors as well as publish for the end users, like a one- or two-page presentation with defined high-level milestones.

I tried Notion, but it does not cut it in a sense a good-enough result requires too much of a tweaking.

It would have been nice if I could export features from github/gitlab to such a tool, group them by similarities or single out the bullet points and then rearrange in a visually-appealing manner.