You can do this with power automate flows. In this example I used opportunities and the trigger is when the status changes to won. You probably want to set your trigger to creation of the marketing form is my guess. Once you select the trigger, you need to click on the ellipse(...) on the right of the flow and select'settings'. Under Trigger conditions you need to add a trigger condition and paste in the following:
@equals(triggerOutputs()?['body/_ownerid_type'],'teams')
This is so that if these records are not owned by a team, the flow won't trigger. The second step is where I get the owning team's unique ID so I can use the out of the box email field of the team. (You can setup groups in office 365 for each business unit, which is very similar to a distribution list. You can then keep track of the members of that list in exchange.) Make sure you add the email field to the teams form and add the email address for each team. Below is a screenshot of the flow.
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below is the window you'll see after you click the ellipse and select settings
entire flow:
