It’s normal in a lot of companies. I typically have my bosses and my team lead’s calendar up throughout the day. Helps to fill in the gaps and get a feel for questions I’ll ask later
Somewhere along the line, people started scheduling me for events in conflict with other events. Why? My online visible calender was free and clear into eternity so obviously I have nothing going on at 2pm. Explaining not being able to be in three places at once got old fast.
So now I have an eye toward using the calendar "defensively". Here's when I usually come in, here's when I usually clock out, here's when I usually take lunch, here's that weekly meeting I have to attend for someone else's giggles, here's when I'm helping Jimmy with this thing, here's when Samantha is helping me with the other thing. You want a meeting? Now the calendar begins a negotiation.
I may or may not like it, but the tipping point has come and gone for me.