Zoom on non-Product page images

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Hi guys - is it not possible to pinch zoom or click and enlarge photos on non-product pages? All the apps I've found seem to only apply this effect to Product pages.
This is odd as my Product page images load up quite large but images in regular pages are way too small (I'm a photographer so seeing a large-as-possible version of a sample wedding photo for example is crucial).
The image resolutions I've uploaded should be more than fit for purpose.
I'd be very grateful for any help - at wits end here!