Picking a template from the Workflows app drops you into a simplified Power Automate flow, already wired to post into the channel or chat you started from. Under the hood it's the same flow engine as the standalone Power Automate app: a trigger (a new form response, a schedule, a button someone presses), then a sequence of actions, send a message, update a SharePoint list, wait, branch on a condition.
Because it's genuinely Power Automate, anything built through the simplified Teams entry point can be opened and extended in the full Power Automate designer, with access to its entire connector library, not just the handful exposed in the quick-start templates. That's the real strength here: it's not a separate, limited tool, it's the same platform with a shortcut into it.