TheTVApp appears to list the major soccer leagues and competitions: Premier League, LaLiga, Serie A, Bundesliga, Ligue 1, MLS, UEFA Champions League, Europa League, and Conference League. It also mentions international tournaments and qualifiers such as the World Cup, Euros, Copa America, AFCON, and World Cup qualifiers.

Leagues listed

  • Premier League
  • LaLiga
  • Serie A
  • Bundesliga
  • Ligue 1
  • MLS

Other soccer competitions

  • UEFA Champions League
  • Europa League
  • Conference League
  • World Cup qualifiers
  • World Cup
  • Euros
  • Copa America
  • AFCON

Note

The site also says it may cover smaller leagues and cup competitions when streams are available.

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Type Examples
Domestic leagues Premier League, LaLiga, Serie A, Bundesliga, Ligue 1, MLS
European competitions Champions League, Europa League, Conference League
International events World Cup, Euros, Copa America, AFCON, World Cup qualifiers
TL;DR: TheTVApp says it covers the big European leagues, MLS, and major international soccer tournaments.