There are loads of other possibilities. For example there is Minerva Virtual Academy, King’s Interhigh, Wolsey Hall, Pembrokeshire college, Oxford Learning Online and Homemade Education… Then there are providers who are specific to certain subjects, e.g. South West Science (don’t be put off by the name they have online provision), Humanatees, TeachallaboutIT, Teachallaboutfilm, KanduIT, Learntec… Then ones that don’t focus so much on traditional academic learning such as Technology Triumphs, ACED qualifications
If online tutoring is working well, I would push for that to continue. If the EHCP is lacking, do you have the right of appeal? If so, appeal.
The EHCP should also cover more than just online schooling/tuition. What about therapies, mentoring, exercise/sport, social interaction, accessing the community, PfA, things like music/art/cookery/drama/chess (whatever DD is interested in), equipment/resources/subscriptions/memberships/a budget for sundries and professional time…