Prescription charges

I am appointee for my daughter and we're in the process of migrating from IRESA support group to UC. Started the claim on 1 September. So far so good. I was able to do everything for her online. Then I got a letter from DWP to say she will now be on contribution based new style ESA from 15 Sept. I was expecting that so still so far so good. Telephone appointment booked with UC for 23 Sept has now changed to 1 Oct. 1st payment due 7 October. In the meantime I raised a query in her journal about prescription charges and would she have to pay whilst she is migrating after the ESA 2 week run on period to be told the following by UC :

... classed as being on UC from the date of her claim which is 01-09-2025. Please tick the UC box for prescriptions after that date.

I have since found the right answer to this on the forum and no she is not entitled until after I'm presuming her first payment or that telephone call. This is a serious error by UC and could have resulted in me getting a fine!