It's true that better phones are often "good enough" for general photography.

But an interchangeable-lens camera is going to be much more versatile. For one thing, depending on the model, you probably have 20 Mpx, compared to the iPhone's 12.

The iPhone's sensor is tiny, and if you try to do night photography, chances are it will look noisier than the Olympus. Again, depending on the model, the Olympus probably has better image stabilization — I can take ten second exposures, hand held, with my E-M1 Mark II!

Depending on the model you have, the Olympus probably also has many niceties that the iPhone lacks, like

• multi-shot capability for increased resolution up to 80 Mpx, (HR),
• multi-shot dynamic range improvement (HDR),
• close-up (macro) multi-shot focus improvement (focus stacking),
• multi-shot long exposures for outstanding night photography (Live Composite),
• multiple shots before you trip the shutter (Pro Capture), up to 120 images in a second, which is great for getting the exact instant desired, like when the football touches the receiver's fingers, or when your toddler has the perfect facial expression.
• don't underestimate what you can do with different lenses, from near-microscopic photography, to extreme 210° super-wide angle, to extreme telephoto.

You'll really appreciate the differences as you do more specialized things, like sports, wildlife, or extreme close-up.

But if you're just taking "ordinary" photographs, of family, for example, then you'll probably do just fine with a phone.

Here's some pictures that may be difficult to do on a phone, that were fairly easy to do with the Olympus OM-D E-M1 Mark II:

Taken with a 350mm ƒ/2.8 lens and a 1.4x teleconverter at a range of a hundred metres, this would be impossible on a phone.

This was taken in a dark theatre, using a 35-100mm ƒ/2 lens with 1.4x teleconverter; your phone can't get close enough with so little light.

Taken with a 210° 3.5mm ƒ/2.8 circular fisheye lens, which you can't find for phones.

Taken with a wide-aperture, super-wide angle, non fisheye, 7mm ƒ/2.8, this allows great subject isolation.

Industry-leading "In Body Image Stabilization" allows for hand-held creative effects that previously required a tripod.

Using a special "tilt" adapter allows for foreground-to-background sharpness.

Special "macro" lenses allow for much closer photography.

An inexpensive 500mm "mirror" lens allows you true telescopic images.

A "Live Composite" shot automatically takes and stacks, in-camera, over a hundred night exposures.

In short, you don't choose a conventional camera over a phone to make ordinary images better, you do it to make extraordinary images that the phone simply can't do!