A one year old will be crawling, walking, climbing on everything, pulling everything out of cupboards, falling over, making noise. If they see someone on a laptop they will try and shut it, pull it over, press the keys, pull the power cable out. I have a job where I am on video call about a third of the time, on the phone a lot and in between I have to concentrate and write technical pieces which I then have to present. I literally couldn't do any of that with a toddler unless they were napping. And whenever I've been forced to do this in an emergency when kids were sick, the only way I've managed to get anything done is stick them infront of the tablet.
Even with my 7 year old who can amuse herself there are constant interruptions and I have to keep going into the room she is in to stop her doing things she shouldn't be doing, so I can work but it's harder to concentrate.
Anyone who does this has a super easy or super flexible job, that doesnt need any interaction with others, or they are doing a shit job of work or a shit job of parenting and most likely both. A lot of employers have a rule that you cant look after your kids whilst you're working other than in an emergency.
You're meant to be working. At that time, your home is a place of work. Young kids shouldn't be in places of work.
Remember that lots of people who are responding will have tried to do this in covid, including myself, and are speaking from experience. Experience of asking your 2 and 4 year old to be quiet while you're on a call and finding they've drawn on the sofa. Experience of having to stop half way through a presentation as they had found and were playing with something dangerous. Experience of phone calls with your boss's boss being interrupted by someone shouting they've done a massive poo. Completely unprofessional now that childcare is available again