EHCP quantification when not on Ed Psych report

My primary-aged child has an EHCP, and a recent independent EP report identified severe dyscalculia. We are planning to request an early review / amendment of the EHCP. We have not yet sent the report to the LA or to the school.

The EP report clearly sets out the nature of provision required—specifically an individualised, structured maths programme (CPA approach) delivered by a teacher with specialist SpLD/dyscalculia qualifications and experience.

However, due to the psychologist’s terms (they have strict terms and conditions and do not undertake tribunal/EHCP quantification work. We went back to them and they strengthened the recommendations as far as they could within their remit.) the report does not state exact hours, frequency, duration, or group size.

We know Section F must be detailed, specific, and quantified, and that the LA has a legal duty to secure it—meaning they cannot delegate the quantification to the school's discretion.

What is the most effective route to get an enforceable Section F without giving the LA an excuse to issue vague wording like "regular" or "as required" ? Do I just send in the EP report and ask the LA to amend Section F and determine the appropriate frequency, duration, group size and level of expertise based on the professional evidence?
All advice greatly appreciated