Phones encrypt the data by default, your password or pin is also needed to authorise the connection with a computer.
However, many people do insecure things like storing passwords etc in Notes applications, or having simple PINs that are easy to guess, don’t update their devices, or even turning off security features (if they can) because they won’t take a small amount of time to understand them.
I’m not sure that Sublinks will happen. It was breathlessly announced as if it was coming soon with the promise of regular updates. But here we are eleven months later with no updates at all.
To me it’s just seems like Lemmy and the Threadiverse are slowly evaporating.