Sega is planning to start signups for the second closed beta on February 2nd, 2021. Those who have signed up for the first beta, but didn't get in, will automatically be entered into the drawing for the second beta.
If you were already selected to play in the first beta, you will automatically be able to participate in the second beta.
The game client from the first beta will also be used in the second beta, so there is no need for you to uninstall the game.
Details about signing up for the beta will be posted in the future.