StarHeartDiamond - Not a teacher, but… if your child is likely to fail, is it because of poor phonics teaching or despite good phonics teaching?
You can generally tell whether phonics is being taught systematically and exclusively, because the child is not doing practice tests at school or at home, is not constantly talking about alien words and is not overusing Phonics Play at school.
Many pass the phonics test despite poor phonics teaching, because they’ve received support from a knowledgeable parent or has worked it out for themselves (my daughter is likely to be one of these).
Few fail the phonics test if they’ve had good phonics teaching. If the whole class has received systematic, repetitive, fun phonics teaching for a few minutes every day from the start of Reception they’ll have covered all of the sounds (to this stage) many times over. Decoding is straightforward to these children. The test is trivial.
Regardless of why your child is struggling, you’ll want them to be able to decode (read!) effectively going forwards, so I’d be inclined to step in an help at home as soon as possible (even if it ‘helps’ the school get a better score than they ‘deserve’ if they’re not teaching phonics well).