On a similar note I've had various annoyances with wanting to round trip diagrams from Mermaid or PlantUML into Miro and vice versa. There doesn't seem to be much out there to facilitate this, which is strange, because it feels like a very enterprisey thing to want to do.

There's probably a SaaS product in it for someone sufficiently interested in the topic... probably not at unicorn scale, but enough for a side income perhaps?