For me personally, I dont have it together, that's just an illusion/what it looks like on the outside.
Certainly when it was older baby plus toddler or two toddlers, I very much didnt have it together (this was the hardest age for me by a long way).
4.5 and 2.75 now and I'm starting to find time to brush my hair more, but things like make up, excercise etc are still a pipe dream when you include things like work.
My house isn't disgusting, but its a lived in family home, not a show home. In the first 6m or so I used a sling extensively - baby fed in there, slept in there etc. This meant I could just carry on with toddler things pretty much uninterrupted. We went to the park, did crafts, shopping, day trips, and when baby wanted to feed I'd just latch her on, on the move. So apart from rubbish sleep at night, nothing really changed in the day, apart from basically veing a kangaroo with a joey attached 😂
Once baby became old enough that she wanted to explore, was mobile etc, there was a lot more juggling of their needs. It was HARD, but at least I was more used to having two by then.
The game changer for me was 2 things: (1) them properly starting to enjoy playing together (2) sleeping for more than 2-3 hours in a row. Both of which happened around the 2y mark for my youngest
Now i spend a lot of time as referee, and it's undoubtedly still much easier with one at a time, but two feels absolutely fine.
Watching their relationship grow, and the love they have for eachother makes it all worthwhile.
Two close in age is hard for the first few years, but it has definate benefits later on.