Canonical URL for duplicated posts

My game company started a devlog on itch.io, but going forward I’m considering using write.as.

The key feature I’m missing in order to make the move is the ability to set a canonical URL.

As an example, DEV.to makes this very easy:

For all future posts I plan to be using write.as exclusively. But the existing posts on our itch devlog are pretty much stuck there. Since Itch doesn’t have an export/migration option, our second best option could be to recreate our devlog posts on write.as along with canonical links pointing back to our original posts on itch.

This is also very useful for safekeeping of posts that I’ve written e.g. on company blogs.