Create an Easy way to Video Chat with Non-Microsoft Users (eg. Gmail)
Create a way to invite someone to a video chat when that person does not have a Microsoft 365 account. For example, if I had a client who has a gmail account, I could email them a link to a browser based Teams meeting window. From there, they would have all the functions (or some restricted functions) that they would if they did have Office 365 account.
John Egleston commented
This feature exists, if allowed by tenant admins. You can invite anyone - with or without an email address - to a non-channel Teams video meeting. They can participate through the Chrome browser, at least.