"Fixtures & Live scores App for World Cup 2022" is a very complete and good non-official app to follow the World cup 2022 football tournament in Qatar. It is easy tu use and keeps you up-to-date with live scores, news and schedules. 
This app contains everything you need about the Tournament : 

It shows all groups with all matchs schedules (per group and per team)
It give you access to live matchs results : live scores, standings and fixtures
Alarming: user can set alarm for each match before starting
Notifications : user can configure notification for one more team for better follow of the favorites teams
News : you can have the latest new about the World cup 2022
Top scorers : user can access the Top Scorers of the World cup 2022
stadiums list : you can see the list of stadiums of the World Cup 2022
World cup Records : gives you information about the countries that won the oldest version of the World Cup.

Fixtures, Standing and Livescores of the World Cup 2022 competition - Qatar 2022