There are 3 people WFH at our house - me, my wife and my sister. All have got their own corners to work from. We have explained our daughter why she should not do just 1 thing throughout the day. Some activities like art/craft/drawing/coloring. Some Lego. Some reading. And some controlled TV time. She doesn’t get an iPad or mobile.
She is also welcome to come to any of us to mingle, but only if they are not on calls or in middle of some important work. Someone else takes over in that case. Regular breaks are still in, like lunch, tea time and it is spent without a miss when all are together.
Things have been going fine for last week/week and a half. Might need some changes when this routine gets boring.