Like Bozo said it falls under "distracted driving." That category allows police some leeway depending on what you were doing, if it caused an accident etc. It covers more than just cell phones, but that's the most common use of the law. It's rare to hear of the other scenarios being talked about in the news or around the water cooler.
Every province here in Canada does at least a fine. Some also do demerit points off your license, increased fines if you decide to repeat & license suspensions.
Fines range from $172.50 to $3000.00
What is distracted driving in Canada? Discover the laws and penalties for each province & territory in 2022, and what the rules are around passengers, pets, etc..
www.canadadrives.ca
I see handheld cell use here frequently regardless of being in my car or on my bike. Texting, watching videos, phone calls and even video calls. It really gets me riled up when I see those, but I'm personally biased. Everyone knows it's illegal, so it's jut a case of "I don't care."
I think it's just as dangerous as DUI even though it's often "condensed" in time frame. Those few seconds is all it takes though to change someones life.
Somewhat off topic, my wife lost her cousin and spouse to a drunk driver 18 years ago. Luckily the 2 young kids in the back seat survived, although not without injuries. The intoxicated driver also survived and was sentenced to 5 years in prison. (He got 16 years total but the 5 sentences were to be served concurrently, with 5 years the longest single sentence.)