Christ no - another single parent here...
How old are the kids? I require a lie-in at the weekend (laughs hollowly - I mean 8am.. during the week I'm up at 5 for work), and they wander down and get their own breakfast, and I ask them to keep it down/shut the living room door so I can enjoy that little bit of downtime.
I can't really stay up because of my early work, but I do sometimes in summer, so I feel like an adult, and I just have a nap the next day at lunchtime.
I'm also strict about bedtimes, so I can take my time winding down in my own room once they're in bed (I'm lucky, this hasn't been an issues since they were toddlers)
And lastly, I'm OK with screen time. Even at some meals, sometimes it's just to get food in you, and it's fine that we each have our own screens on while we do that (in my opinion). (as long as if I ask them to put them down and turn them off, they do that without fuss).
But yes, the holidays are long, and finding some space is hard.