The only constraint on that is section 48 of the Constitution, which talks about a quorum of 20 members for the exercise of the House's powers. The most likely area where that could be raised in court is the adoption of legislation. However, there is significant leeway in terms of parliamentary privilege, and, as I've put forward, my interpretation is that this provision could withstand the acceptance by the House of virtual presence, but that has not yet been fully determined in court.
On April 21st, 2020. See this statement in context.