Yes, F needs to state the actual content of the package. That includes tuition, physical activity, art and everything else. It should include the full package DS will (hopefully) achieve. Direct and indirect provision. It is normal to build it up slowly. What you don’t want is to include only what DS can access now/in 3 months, then get to 8 months and realise DS needs more, but the wording in F isn’t right.
SENDIST won’t deal with the PB, but they absolutely will deal with the content of the package in F. Having the provision in F is essential because the LA is highly unlikely to agree a PB for provision that is not detailed, specified and quantified in F or is not required to fulfil their duty to provide the provision in F or is not part of their duty under s19. I presume when you say you want a PB; you mean you want DPs?
For example, DS3’s includes: “X must receive 14 hours of face to face 1:1 home tuition per week for 39 weeks per year from subject specialists with [list of training/qualifications/experience (this includes QTS otherwise the LA will use someone without because they are cheaper)]. This will include [list of time spent on each subject studied]. Each session will last at least 1 hour and no more than 3 hours.” Most are 2 at most. 3 hours seems a lot, but DS3’s tuition isn’t all sat at a desk. For example, it needs to cover being able to go to the theatre for English. F then goes on to list ways the teachers will support DS3’s learning, modifications to how they teach, etc. It also has wording “…39 weeks provision to be delivered flexibly and responsively over 52 weeks to support continuity, consistency and engagement…”
F also includes the wording “Priority must always be given to those professionals with whom X has an existing trusting relationship…” to stop LA using someone cheaper on a whim.
Another example: “For 39 weeks per year [the 39 weeks he also attends his AP] X must receive 3 sports sessions of his choosing per week with each session lasting at least 1 hour.” The ‘his choosing’ is to stop the LA picking the cheap/free options all the time. He then has the same but 5 times per week for the other 13 weeks per year outside of term time.
Will DS continue to attend the school at all? If so, the school must be named in I even if DS will be flexi-schooling.
You should relook at the wording of the “type of training and experience the people giving the provision should have”. It would be unusual for this to be written to a satisfactory standard without the content of the package actually being included in F.