I agree with the above, reflect is available by default in any Class or Staff team. To access the app, navigate to your desired team, then select the Reflect tab. Other types of groups
may not be available.
Besides, to have access to the Reflect app, you will need an A1, A3, or A5 license for Microsoft 365.
For more details about get start with reflect in Teams, you could refer to this article.
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