Some people have reported to me that the beloved Send an HTTP request (V1) under Office 365 groups that we used to easily call Microsoft Graph is not available anymore when creating new flows.
It turns out it has recently been deprecated, as stated by Microsoft, and we are recommended to use V2 instead:

Unfortunately, the V2 action only supports the /groups endpoint and will not allow us to create planner plans.
The alternative
At the moment there is no alternative available with Standard licenses to call the Teams and Planner endpoints. However, we can use the ‘HTTP with Azure AD’ (which I believe that soon is going to be renamed to something related to ‘Microsoft Entra’ due to product naming change) connector to call Microsoft Graph, and create plans/teams tabs, if you have access to proper Power Automate licensing.

As in a previous example I wrote, let’s build the Flow to create a Planner Plan and add it as tab to the General channel of a Teams team, but…
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More About This Author

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SharePoint and Office 365 Consultant/Developer always trying to get the best from Microsoft stack (Microsoft 365/Azure/Power Platform and related stuff).
Living in Ireland since 2018, I had previously worked in Brazil as a consultant/developer for Office 365, SharePoint and related technologies for almost 10 years.
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Modern Workplace16 September 2023Call authenticated external APIs using JavaScript from Power Pages
Modern Workplace9 September 2023Using SharePoint list formatting and Power Automate to create linked items (via LookUp field) in a related list
Modern Workplace1 September 2023Using the HTTP with Azure AD connector in Power Automate to create Planner Plans and add them as Teams tabs
Modern Workplace26 August 2023Create an Issue Tracker App using Power Apps Copilot (Preview)