@MarilynG1 There is no additional code in box 7, and no box 2b present at all. This form is very similar to this sample form (with box 1 and 2a equal to the amount received, box 5 and 9a blank, and the code 4 in box 7) Would the lack of the code A mean it is not eligible? I have not and will not receive any further distribution related to this.
After more digging, starting with the SF2800-1, which guides to Pub 721, then Pub 575, then the 2024 version of Pub 575, what do you make of the last item found under "Distributions that don't qualify." on page 21?