After you file

I've seen you answer several questions on here so I am very thankful! I received unemployment but I was also 24 in 2020 so I am ineligible for my parents to claim me. Unfortunately, they usually have so I went ahead and marked that they would because I actually dont have contact with them. It turns out, they cant, and I'm unable to amend my return until the unemployment credit instructions are made public. So, does that mean I am out of luck for the stimulus? If so, will I be able to get it back some other way?