Processing the Form 15111 is part of processing the original return.
DO NOT file an amended return while the 15111 is in the pipeline. An amended return will just cause confusion and additional delay.
It might be another four months or more before you hear anything from the IRS. They are severely backlogged on anything that requires manual processing, which Form 15111 does. They have said that they hope to clear the backlog by the end of 2022. In the meantime, as Critter-3 said, there is nothing you can do but wait.
