If I kind your sentence into Adobe InDesign, Affinity Writer, MS Phrase, or Pages, I get one thing very very like this in all of them:
I’ve normal UK English language settings, and these apps haven’t been configured in any particular manner. I can discover no further settings to show curved quotes whereas nonetheless having straight apostrophes in any of them.
As you say, I can ‘pressure’ a straight apostrophe utilizing CTRL ', and this for me works in Pages and different apps (however not in Phrase, curiously).
Nonetheless, in a few years of working in e-book publishing and typesetting, I’ve by no means heard of the (fascinating) follow of utilizing straight marks for apostrophes.
Hart’s Guidelines for Compositors and Readers (OUP) offers clear examples of curved apostrophes in contractions; as do Robert Bringhurst’s The Components of Typographic Type and The Thames & Hudson Guide of Typography.
I’ve been unable to seek out any authority that commends it: most condemn it as a vestige from the usage of typewriters.
Your assertion that it’s “appropriate English” is, I might recommend, not the prevailing view, which could clarify why Pages, and different apps, do not observe it.
Altering the language to US English does not straighten apostrophes for me, so that may recommend that it is not native variation. (Additionally, I’ve many US books on my cabinets and I can’t discover a single one favoring this fashion.)
In case you actually needed this, you may configure Auto-Appropriate with frequent phrases like will not, cannot; in order that the straight type would exchange the typed type.
