Sync solutions

If terminals are troublesome, there is Working Copy app on iOS (paid). There are threads for that too.

If the vault is small, there is Git 3rd party plugin that can work on mobile (I don’t use it).

There is a learning curve with git, so people who can’t learn will pay for services made easy for them, as usual.

There is some Remotely Save plugin I never tried.
There was some Google Drive plugin advertised a month ago to work on iOS as well…? Never tried it.