How should be your relationship with your PhD advisor
This depends on personalities. For some it is perfectly acceptable to be very informal. For others, such as mine, a more formal relationship was needed. But, even in a formal relationship, you need to have your questions answered and concerns addressed. But it is really a matter of &quot;style&quot; how you go about that.
So, the first thing to do is ask the advisor what they prefer and how frequently it is &quot;good&quot; to touch base. Even with a formal relationship, an advisor might want a progress report every couple of weeks (or more, or less).
But work it out initially. And, you want to have a good relationship so that they will be willing to support you after you finish, as well as during your degree years.
Of course everything was, and we hope will be, in the absence of a pandemic.

Note that different advisors rank different parts of their job differently. Some value their own research very highly, which can be a problem if they aren't as helpful as they should be. I often worry about untenured advisors for this reason (and once suffered because of it until I switched). But, I'd just guess that phone conversations with advisors are pretty rare (though mumble mumble pandemic).

And you might also want to look at my earlier question and its answers on this site: How do you build a healthy and productive relationship with your supervisor?