I will say similarly that Zoom is not unique in terms of security flaws. Any video conferencing platform would have issues. Zoom became famous with the Zoom bombing, etc., that happened recently, but they at least have openly reviewed a proposal for end-to-end encryption that would be sufficient for at least the integrity of the data moving between the two ends.
In the end, I think your guess is as good as anyone else's. You could say Microsoft Teams has better security. At least they advertise it as having better security, and it appears to have good security in place, but all in all I think they are all going to be in the same group as being vulnerable to any third party type of attacks, networking, etc.
I did mention at the end of my seven-minute opening statement that the routing of the data is awfully important. Definitely Parliament should make sure how the data is routed and which part of the network the data actually ends up travelling through.