I work with students overseas applying to universities in the UK (and other countries). Many of them are British passport holders, and many have been overseas for years. Of their five choices, every single one of our 120-strong UK cohort get home fees status at at least one of their choices every year, and often in all five choices. In fact, there is a whole industry growing up around tracking which universities are more 'generous' etc (I don't do that, I work in a school), so it's relatively easy to apply strategically after research and get a home fees offer. For our students who have 'only' been here for sixth form, they almost all get home fees, except at Edinburgh, Kings and Imperial, who are notoriously strict.
The uni will ask for documentation in many cases. The more of this you have, the better:
-owning property in the UK
-paying council tax
-having lived in the UK for at least 7 years
-working overseas for a British company/international company that has 'posted you'
-paying UK taxes
-maintaining links with the UK through regular trips back
-being in a country on a visa linked to a job, so your residency rights are lost if you complete your contract
-etc.
This is down to the fact that 'ordinarily resident' hasn't been given a strict definition in UK law, and in fact it has been proved that it is possible to be 'ordinarily resident' in two countries simultaneously. It is challenged in the courts relatively recently. UKCISA is a great resource to know the rules, but be aware that each uni is responsible for applying the rules, and their practices vary wildly.
OP, if you want to pm me feel free! If you want to mention specific unis your daughter might be interested in, and if you meet many of the criteria mentioned above, I can tell you how likely we'd think your chances of home fees are.