Multiplayer servers not showing FS19

I'm Samy an independent advisor. Welcome to the Xbox community. How are you?

Go to Windows settings>Gaming>Xbox network wait for the test to finish and then click the "fix" button
These steps can help you, give it a try.
1. Logout from Xbox app and Microsoft Store app
2. Look for the Xbox app and Microsoft Store in the Windows bar, right-click, click app settings and then click terminate, restore and reset. Do this with the game too.
3. Clear the store cache type ''wsreset'' in the Windows bar, run as admin, and wait for the screen to close and open the store automatically.
4. Open the Microsoft Store, click on the 3 dots in the upper right corner ''download and updates'' and click on ''get updates'' and update everything.
5. Login with your account again in both apps and try again.

You can check if this solution helps you with your connection problem with FS19 servers:
https://answers.microsoft.com/en-us/xbox/forum/all/farming-simulator-19-multiplayer/e7f46ad0-94d9-412c-bdf9-d2dfa53394d2

Someone else recently was having issues with the Multiplayer component of FS19, though they could connect but kept getting disconnected. Seems to have been an issue on all platforms for some time as you can find STeam posts going back to when it was released

Mods for FS17 wont be released anymore as there is a new version of the game.

Giants are only working on mods for FS19.

If you click on multiplayer -> server browser -> then press RS for show filter then select it in the menus