If you've been playing Season 1 You're running past the point of getting all the rewards until Level 50. Therefore, make sure to Madden nfl 22 coins grind prior to when Season 2 is released if you're missing some of them. You can get more information here regarding when Ultimate Season 2 will arrive in Madden 22 and what kinds of content it'll offer.
Madden 22 launched Ultimate Season 1 with the release of the game, and while it technically was accessible as early as August 12 thanks to the EA Play Trial, the official launch date was on August 20th in 2021. In the past, when each MUT Series land between 30 to 40 days in length on average, things look to be considerably longer this year.
Although an end date has not been made official, EA stated in the build to launching Madden 22 that the new Ultimate Season model would aim to run each season for approximately 90 days. They've already dropped 1st Quarter the buy Madden 22 coins 2nd Quarter Challenge in Ultimate Season 1, with the 3rd Quarter and Fourth Quarter ones expected to arrive in the coming weeks.