Attached is a sample solution using some UIAutomation as well as the Outlook connector to generate a Microsoft Teams Meeting for Outlook 2019+.

The general idea here is to use UIAutomation as sparingly as possible. We will use it to generate an appointment with a random title, and then use the connector to locate that appointment and update the remaining fields. This assumes that no other new meeting requests are currently open and also that the "New Items" button is visible in Outlook. This could potentially be enhanced to navigate Outlook to the proper state, however it is currently expecting this to be done beforehand for simplicity.

Microsoft does provide an API to do this, however that requires some greater C# knowledge and some additional assemblies. If there is enough need, this could become a feature of the product natively in later versions.