Here’s one to bookmark: FiveThirtyEight has launched their redistricting tracker ahead of the 2022 House midterms.
“You can look up which party controls redistricting in each state, where the process currently stands and when to expect a new map to take effect; for states with proposed or final maps, you can also view the demographic and partisan breakdown of the new districts, see which party gained or lost ground and check if the map exhibits any signs of gerrymandering.”

