For Zoom lessons, it's much easier to show what you're doing on the keyboard if you have a tablet/phone holder and tripod. You can get little kits that come with everything you need or you can buy them separately.  If possible it's best to use a larger tablet and tablet holder on top of a tripod.  This lets you (or your kid) see what I'm doing more easily.  The tablet's camera can also be positioned to clearly show the student's hands and piano keys which makes it much easier for me to give good feedback about what's being played.