The EA Play event, showcased many games, including FIFA 21 although we didn't get a lot of information.
EA took to their site to answer the questions everyone had.
What About Any Changes To The 2020/2021 Football Season? Will These Be Reflected In FIFA 21?
EA stated on their site:
We remain in constant communication with our club and league partners around the world to understand the impact of COVID-19 on the footballing landscape. We will continue to liaise with them in the coming months as they work through their plans for the upcoming season.