This one came up during @shwetaneelsharmaās masterclass webinar: How To Build a Thriving QA/Testing Team With People-First Leadership.
Itās something I asked.
How do you call out your manager if you see they are distracted during a 1-2-1?
You hear stories about managers turning up late for a 1-2-1 with their team members, looking at their phones/laptops and not being āpresentā. 
If this has happened to you, what did you do? Or what do you wish you had done?
It happens, and we need to be ready for it. If it happens, it quite probably means you or another team member is not ātaking on tasksā or helping the manager to delegate.
I typically miss around a third of our 1-1 ābi-weeklyā meetings if I know that one or both of us might be busy. It covers a multitude of sins if you just confirm your manager is free beforehand and cancelā¦ but a good manager will remove all distractions and hold 1-1 in a separate dedicated virtual space even if we are all working from home. So it should help if you also build your own dedicated zone, it will help them build a dedicated zone?
I like this. And hopefully for folks they have the option to do that. I think thereās something about āputting your head in a different physical spaceā when reflecting on oneself. I think it helps us reframe things and literally see things from a different angle.
Thanks for sharing, @conrad.connected.
I appreciate it depends on the relationship you have with the person, and how you both like to communicate.
When my manager has seemed distracted in the past. Iāve called it out directly but not aggressively.
For example:
āIs everything alright X, you seem distracted. Is this not a good time for us to chat?ā
A nice open question, off the back of the observation. Gives them the opportunity to get focussed. Or to say that actually this isnāt a good time, and rearrrange when they can be present. Stuff happens, and sometimes it can take time to get into the right headspace. Particularly if youāve come straight from something else.
Iāve been guilty of doing the exact same thing occassionaly, and appreciated when people brought it up. Let us get the most out of the time together.
If its a regular occurence, then thats a whole other story.
Some good points are being made above but it also depends on the situation and on the person. I very much like @flynnbops his response.
Iāve seen before that some donāt care as much (or they show that they donāt, which might not be the case), so at that point I would say something like:
(This was early in my career)
Me, if they are late:
I very much like it for you to timebox your meetings, because this is a very important moment for me to reflect and if you cut the time, it makes me feel less important.
Obviously say it in a proper way so the person/manager knows that you are serious, but keep it polite. He never missed a 1-2-1 again 
I like @flynnbops reply as its noticing there is an issue but asking if they are ok to talk. I dont think Iād have been brave enough to say @kristof 's comment
I did have a manager who kept looking at the clock on the wall when we were meeting, so I switched places, then he started looking at his watch. I then asked if it was a good time as I needed to speak with him and showed him the list of things I had. I think he understood why it was important after that.
I was present during @shwetaneelsharmaās masterclass webinar when this came up. The remote working / video call thing has made this worse but Iāve had line managers who are clearly checking emails or doing other things at the same time.
My other pet hate over the years is when my 1-2-1 is moved about continually because of other āimportant meetingsā that clash. Echoing above, for this to happen all the time does indeed make me feel unimportant. Any time I get a new line manager I try to make clear what my expectations are for 1-2-1s, so the ground rules are set from the start.
The 1-2-1s for direct reports should always be non moveable meetings in the calendar. Managers need to be be brave enough to decline other stuff for this reason. Many are not however.