[gpm]

There's no official solution, but,

It's just linux. It has ssh installed (it tells you the password in the "copyright and licenses" menu, and you can private keys on the device like normal). It connects to wifi. You can write a script that runs on the device and periodically syncs notes somewhere (I have this setup with restic for backups).

Handwriting recognition is done by cloud, and, I mean, unless you want to set up your own software for handwriting recognition (doesn't sound easy) you would need to give up that feature (I have)...

[pomatic]

DIY handwriting recognition is actually really easy using Microsofts SaaS offerings. The results are astonishingly good too - it makes mincemeat of my awful handwriting.

[gpm]

That's really interesting actually, thanks for letting me know!

Not sure trading out remarkables cloud for microsoft's cloud is exactly what OP wants though ;)