Managing my own diary with customers and a team is fairly easy, if you are organised. And you need to be willing to compromise too.
If a client meeting is taking place I ask them for several dates and times they are available and pick the one suits me best. That has meant being on teams at 7am. Or even doing Yorkshire to Glasgow and back in one day, so I could be home for the kids. I was a single parent so my mum stayed with the kids over night, picked ds up from school and I was home for 6.30pm. Mum couldn't have them that night, so I did it in one day. But I needed to be organised and give her plenty of notice.
My teams cover a 16 hour period everyday (4am-8pm) so I would never be on for all their coverage.
I am available on the phone to answer questions even when I am 'off'. For clients and staff. But if I am busy, I am busy and I call back. Ds' school gate is about 40 yards from the house and he is year 6 so I often watch him walk over whilst on a call.
I am really picky about who I have one my teams as they need to be able to work without direct supervision. We are permanently at home now. But, before the pandemic I would be travelling to different offices. So was never there, in person, all the time anyway. So I needed people who would get the work done, without me there.
I also book times I am absolutely not available in my diary. So everyone can see I am not available.
I am am early riser so often get 2-3 hours of my own work done before the kids get up. I sometimes work in the evenings, but keep that to a minimum and do it once ds is in bed. Dd is 18 so often up later than me anyway.
As I said, I do need to be available to take calls at anytime though. But these advocate calls are never more than 10-15 mins. Sometimes happens on a weekend.
There was an emergency late at might about a year ago. I worked all night til about 4am. Slept, got the kids out of the house to school/ college and cleared my diary of none essential work and went back to bed for a bit. That's happened once in 4 years.
But I don't mind doing it because overall my life is easier this way. I get to be able to do work when I want, so a couple of quick calls on a weekend is a good compromise for me. Dp also understands my job and has no issue with me taking calls when I need to.