HI,
I used a helpful tool when preparing for my grade 8 piano ABSRM:
https://e-musicmaestro.com/auraltests/They have a couple of free tests on each at each grade but I went on and purchased the €5 per month charge to get me up to speed for the exam. My teacher wasn't really covering it and I found the website was well worth it.
I used it for 3 months then cancelled my subscription (you can at any time) so it only cost me
€15 and I was able to use it whenever I wanted. It also charts your progress - can show you where you are weaker and where you are improving. I think if you use it for much longer than that the test might start repeating themselves - not sure though.
I found it excellent and I was able for the aural in my piano exam. In previous exams it was always a very weak part of my results but this time around got a good mark. The resource also gave me confidence that I could cope with that part of the exam.