Tmua topics that aren't covered in higher maths

Hi,
I want to apply for Cambridge computing science next year for 2025 entry, however I know the TMUA test is mainly composed of topics from GCSE/A levels, and I am in Scotland so will only have done higher maths by next October. I am aware that the TMUA is being discontinued, but I want to teach myself its topics anyway as (I assume? ) it will be replaced with something similiar. Does anyway know what topics could appear in the TMUA that I will not have covered by the end of higher maths?
Thanks