HR 1976, titled To establish an improved Medicare for All national health insurance program, was filed on March 17 and nearly identically succeeds HR 1384 from the previous session. Introduced by lead sponsor Rep. Pramila Jayapal (D-WA), the bill has over 120 cosponsors. The full text, list of cosponsors, and other details about the bill are available at congress.gov here.
Sen. Bernie Sanders filed S.4204, the 2022 Senate Medicare for All bill, on May 12 with 14 cosponsors. Details about the bill are available here.