My amended return was also received on March 26th 2021, and as of today, April 5th 2022, I'm still waiting. Glad to know that I'm not the only one in this situation. All we can do is wait.
I just recieved noticed yesterday that my return was adjusted. Only took a year a few days to happen....now I am told to wait an additional 3 weeks for a letter. More waiting, but we are moving in the right direction eventually. Hang in there...