I have seen a few posts about people asking whether there are any new teams (Ferencvaros, Crvena Zvezda, Zenit, Ludogorets, CSKA Sofia, Hadjuk Split, Osijek, APOEL, Omonia, Wrexham etc) or leagues (English National League, Hungarian League and Cypriot League) in the game.
For FIFA 19, Slavia Prague, Dinamo Zagreb, Dynamo Kyiv, Viktoria Plzen, CSKA Moscow, Spartak Moscow and Lokomotiv Moscow were announced on 22nd August 2019, which was 5 weeks and 2 days prior to the launch date of the game. It was also after the Beta release date on the 10th August 2019.
In FIFA 20, the Romanian Liga I was announced on 29th August 2020. This was 3 weeks and 5 days before the launch date on September 24th 2020. It was also after the beta which came out on the 9th August 2020.
Therefore if you’re looking for announcements about new teams and league, you need to be looking between around now but definitely from next week to around the 10th September for announcements.