It annoys me only a few apps support this feature. It should be done more at the OS level and you should beable to force apps. For example, I have a logi circle cam I use for a baby monitor and I'd love to have that in the bottom right of my screen while I watch any other program I want...Netflix, Plex, YouTube TV.
There is a developer setting to force apps to be resized....may not be what you want but it still works....
If your logi circle cam will work with tinycam pro that would be best....Honestly any cloud based product is a horrible idea for a baby monitor....local control is always going to be the best. I personally use an Amcrest camera to achieve this. Baby monitor fully automated to show up on the screen when the baby is sleeping. Can't beat that.