In a non-Oxbridge uni, would she get the same kind of hours teaching input
I can't say exactly how many hours of scheduled contact hours she would get at different universities, but she is bound to do a lot better if she understands how the whole interchange between scheduled contact/available contact/own time works. The whole point of a university degree, at least in the Humanities/Social Sciences, is to turn the student into somebody who can work independently, problem-solving, accessing the right help and producing something that is their own.
You don't do that by failing to provide adequate guidance. But equally you don't do it by standing over them every hour of the day. The former would be like a swimming coach throwing his beginners into the pool and expecting them to win the butterfly race. The latter would be like prospective athletes spending the whole year just watching their coach swim and never actually entering the pool themselves: you'd hardly expect them to turn out Olympic winners through that method.
I have taught English literature in the past. I think I give rather good lectures and plan seminars that genuinely make the students think of the texts in a new way. I think my essay feedback, as well as being prompt, is productive and to the point. But there isn't going to be a whole lot of point if they don't get the time to read Ulysses or whatever before the seminar starts. And there won't be a whole lot of point if they don't get the time to really work through their reading through writing their own analysis afterwards, seeing that learning to analyse and write well are among the most important things they are supposed to take from our course.
(How would parents like us to do this? Sit in the room while they are reading, like some kind of prep invigilator, just to be able to say they had contact hours? Or read the whole of Ulysses aloud to them?)
My job was to show them how to read Ulysses, be available at the end of an email if they struggled in the process, let them bounce ideas of me in seminar, give individual advice re essay writing and then provide individual feedback on their essays which they were then invited into my office to discuss individually.