i wrote out a whole response, but I've decided to say that the grade boundaries are purely dependent on people's results and that you can't really compare with other pre-covid grade boundaries or exams.
their is always a chance they are still high, i personally didnt find the exam too bad, but the majority seem to have therefore the grade boundaries will likely lower this year, but im talking about a 5(ish) mark decrease, at max and that is an extreme stretch