I will not be able to attend physically. Is there a way to participate online?

The form of presentation is decided by the organising committee and is presented to the potential authors in advance.

It is up to the organising committee if they allow online presentations in on-site conference. It is recommended that you contact them via the website or EAI Compass.

However, it is generally allowed to make a video of you presenting. The video should capture the presentation (for example Powerpoint) and the presenter going through it. Check the video guidelines on the website of your conference.