I agree that being uninterested in reading and writing is not unusual at this age and may not be an issue in Reception. Then again, it may be. I think it will depend on how hard the teacher pushes and also on your dd's personality: when people encourage her to do things she isn't interested in, is it like water off a duck's back or does she get angry/worried? Spending many hours a day in an environment where people are trying to urge her to do things she doesn't want to do could be hard on her. Having extra help and support sounds nice, but if it is support to do something she doesn't yet want to do then it just piles the pressure on.
Emotional readiness is something to consider too. Is your dd ready to be away from her family for six hours at a stretch? How does she respond when she is with people she doesn't know well? Does she like being in large groups of children most of the time? Does she have the confidence to ask for help assertively when she needs it?
Your daughter may change a lot in the next eight months. You don't have to make this decision now. But it is worth exploring the options in case you feel she is not ready next year. She should be able to stay at nursery until she reaches compulsory education age in the term after her fifth birthday, so you could defer her school start until later in her Reception year and see how she is getting on at nursery. Or you could look at home educating her for a year or two until she actually seems eager and ready for school.
My younger daughter was nowhere near ready for school at four. She was emotionally immature, needed attention occasionally during the day from someone who loved her, didn't communicate very well, disliked crowds, and resisted being told what to do. She wanted nothing to do with maths activities or reading or writing.
She has thrived through being home educated. She progresses at her own pace, gets all the individual attention she needs, and has plenty of time to play. Because she is not doing academic tasks alongside other children of her age who can do them much better than she can, her self esteem remains high. Her short attention span doesn't seem to impede her learning as she dips in and out of books rapidly or whizzes round the museum at speed. She's now 6.5 and I'm confident that keeping her out of school was the right decision.
If your daughter's issues are short-lived, it may be easier for her to start school a year or two later, after she has matured enough that they have ceased to matter. If she has ongoing problems like my daughter, a more flexible approach to learning may be necessary and longer-term home education could suit her. It's worth considering.