[mrd3v0]

Are you aware of this https://signal.org/blog/a-synchronized-start-for-linked-devi...

[ants_everywhere]

I think so, this looks like the feature where adding an new linked device transfers messages from your phone.

What still isn't possible as far as I am aware is transferring messages from Android to iOS or vice versa. Last time I looked into this was a few weeks ago.