Online gatherings are unique in that people may be participating from multiple locations. If you are hosting an event online, it is still appropriate to begin with a land acknowledgement and introduction for where you are personally situated. You may choose to also acknowledge the lands on which your organization or institution is located and, if appropriate, invite others to offer a land honouring for their own location to the group, or by using the chat area.
Examples
BC Campus HyFlex: It's About Equity, Opportunity, and Inclusion event Personal Introduction and Land Acknowledgement