Why did you file a 941x rather than a regular 940 and do it electronically?
Anyhow, I filed our 941x for Q2 2020 on May 4, 2021 and haven't received anything yet. I called the IRS a couple months ago and they said we should have it in September (16 week processing).... that didn't happen. I called the IRS again a week ago and they told me it was still in processing. The agent put a 30 day flag on it so that hopefully it gets processed in that time. If it isn't processed in the 30 days we could elevate it to a Taxpayer Advocate.
