Rather than requesting an interim eval to see if dyscalculia or SDL in math is present, my suggestion is to request that the triennial is moved up. I think things are cleaner this way.
Meanwhile, I'd keep a log of what you see. Note down how much you help her with homework, how long things take her to do, write out what she says like 'I don't remember the reacher going over this' or 'I forget how the teacher said to do this' along with the date & the assignment.
Ex: 10/11/22. Chapter 2.4 1-8, 10, 12, 14. Started at 3:30, finished at 4:15. Redirected her to look at 4-7, 12 & 14. 'This doesn't look like the problems we did in class.'
My guess is 11 math problems shouldn't take 45 minutes - should be 20-30 minutes. This provides data on her struggles as well as the type of problems she had problems with.