Yes.
There is also handling limit, speed limit, ergonomics limit, zoom limit, low light and macro capabilities limit, and many more. Once it has no dial, it is toy camera. Once it is thinner than 1/2" it is toy camera. Deal with it :-D
You list features, not the limit.
What feature is that you can´t handle your camera? Huh...
You can notice I never said smartphone cams have the same IQ as FF cams, I ask where the limit go.
It´s individual, and most people capable of evaluating camera would propably agree that phone camera should be marked as toy camera.
For instance, "ergonomics": does a handle define a real camera?
Yes, with other "features" as you say, it does.
Are compact cameras not real cameras? etc.
Some are, some are not. Especially when vital settings are burried in menus, instead of available on one tap or drag (touchscreen), or available with dedicated hw controls.
Sure a beefy FF is more powerfull, does that mean a less powerfull camera is a toy and not a camera?
No. Toy camera becomes toy camera when you can´t do essential things with comfort and speed.
Look:
How do you turn on your camera on phone? What, and how long does it take?
What is the first shot from time you touch the phone with your hand?
how comfortable is to shoot with one hand?
How does it handle with telephoto lens?
How about lens cover and lens hood?
How many shots can it take before it´s low on battery, when you wait for your shot?
How powerfull is the flash?
What does it take to change ISO speed?
Does the existence of medium format make FF a toy?
For certain usage, yes it does. FF is bad joke and toy compared to Hubble.....
If you want to shoot night photo, sports, BIF, macro, large product photography and many more, and you use iPhone for that, you use TOY.
If you want to remember what does the product look like for oncoming search and purchase, iPhone is awesome tool.