How do you do packet inspection when they're all encrypted?

You install a proxy server that MITMs all connections and reencrypts data with your own certificate that you install in your system.

TLS MITM. But you better be 100% sure your middle box is not compromised.

This. Not so hard to do and lots of corporations already do it.

But yeah - whatever you are running on that box better be legit!

You can still inspect whether you’re having packets sent when you add text or just when you click on certain options

You could add large amounts of text and see if the packets increase proportionally.

You can perhaps analyze which apps or extensions are sending packets.

This post doesn’t provide enough information of value

> You can still inspect whether you’re having packets sent when you add text or just when you click on certain options

Batching very commonly obscures this kind of UI interaction reporting.