The OWA team has added a “Teams meeting” toggle in the new meeting item, as a preview feature. If you’d like to try it out, please turn on ""the new Outlook" toggle in the upper right corner. We’ll set this to completed once it’s fully released by the OWA team.
Thanks!Chad Campbell commented
I would personally like this feature as well. I prefer OWA because it has "pins" and "likes", which the desktop Outlook client doesn't have at this time.
I would also prefer to use Teams. While OWA has an "Add Skype meeting" button, it does not appear to have an "Add Teams meeting" button. Yet, the Outlook desktop client does have a button for "Teams".