These days there is no culmination of scales, you are asked for whichever are stated in the syllabus for the grade. But naturally they are set to ensure you cover them all eventually. I started learning guitar during the first lockdown, I’m a piano teacher and I found the Abrsm scale book quite useful.
As teacher, you set the curriculum, the exam syllabus is a useful guide.
Trinity aural is very very different to abrsm aural and the longer you stick with one the bigger the gap will be, sight reading can be avoided with trinity up to grade 5 but it’s not a sensible idea.
Abrsm have recently launched performance grades, which were implemented quickly in response to covid, I haven’t used them yet but from what i can gather you record and submit 4 pieces from the grade books, they carry equal weight to the regular exams.
Your best bet is to have a good read through the syllabus which are easy to find online. Abrsm, web site is infinitely easier to navigate than trinity. As mentioned above the only theory required is g5 Ab before progressing to g6, no requirements for trinity.
The only thing I would caution is teaching your own daughter, it lasted 2 weeks for me before I passed her to a friend, I know many who have tried, few have persevered.
Feel free to message if you have questions.