Where can I find my server ingame FS22?

You can easily find your server ingame.
You just have to make sure that the filters you use match the settings of the server.
You will also find an input field at the top right. There you can enter the name of the server.
This narrows down the selection of servers.
You can find the filters you need and the name of your server in the web interface of the server.
How you can log in to the web interface is described here: How to log into the web interface.