For those of you who follow the post’s idea of filling up your calendar, do you mark the time as “free” so that your employer/coworkers can schedule over your t

For those of you who follow the post’s idea of filling up your calendar, do you mark the time as “free” so that your employer/coworkers can schedule over your time for meetings? I’m thinking of the feature “find a convenient time for everyone in the invite” in calendars. If your calendar is booked, does that mean people have to come to you out of band to negotiate a time? Do you fill your calendar up day of (I.e. Monday morning you fill in around the meetings you have)? I have on my calendar a 2 and a half hour chunk of time every day for training/lunch. But that’s the only recurring meeting I have for delineating my day.