Very Confusing! I found this article on Forbes & it looks like it was supposed to be extended:

Live Updates

May 20: 2019 calendar-year partnership and S-Corp tax returns, and 2020 Section 475 elections for partnerships and S-Corps, were due March 16, 2020. These pass-through tax returns and entity 475 elections are not eligible for virus tax relief with the July 15, 2020 postponement deadline. Postponement relief is limited to 2019 tax returns due April 1, 2020, or after, and the March 16 deadline was before April 1. However, fiscal-year partnership or S-Corp tax returns due on April 1, 2020, or later are eligible for the July 15 deadline.