Hello! My name is Mustafa, and I am an Independent Advisor as well as a long-time Microsoft user. I'm sorry that you are experiencing this issue, and I am hopeful that I will be able to help you find a satisfactory solution.
if that didn't work then I would recommend you uninstall and reinstall the latest version of teams.
Also, do you have to double-click to open other files or applications?
if yes, than it could be an issue with your mac settings and not a teams issue.
Please let me know if this doesn't work or if you need further assistance.
Warm Regards,
Mustafa