A growing number of music students are studying through online platforms – even renowned teachers like Pinchas Zukerman (violin) have done so. It is different from an in-person experience – you cannot place your hand over that of the student or sit next to them to observe, but there are real advantages: the student can see you and receive guidance from you as they play, you can demonstrate from your piano what it is you expect of them and you can create a community of students who share ideas and best practice.
Colleagues at Humber College created the “piano cam” (see here) for their online teaching of piano. There is a helpful video of how to set up your piano area for online teaching (here) and a longer article from one of your peers who decided to make teaching piano online work (here).