What is the latest version

What is the latest version of Jami for Linux ?

You can get all new stable versions for all supported Linux distributions here:

https://dl.jami.net/stable/

Is there a method to determine the latest version for different operating systems

Simply use this link:

https://dl.jami.net/

And obviously you can use the offical download page:

When it comes to the desktop version go to
Open settings > General > Updates > “Check for updates now”

for all OS we provide on jami.net