See example below that should get what you're looking for.
See full flow below. I'll go into each of the actions.

Reoccurrence runs every 10 minutes.

Get items uses the following Filter Query to only return items where the Status is equal to Submitted.
Status eq 'Submitted'

Condition will check the length of the items returned. So, how many items have a Status of Submitted. The expression used is:
length(outputs('Get_items')?['body/value'])

If the Condition is true (at least one item returned) it will go into the Yes branch. In the Yes branch I have Post message in a chat or channel and use the following expression to get the number of items returned (same expression we used in the Condition).
length(outputs('Get_items')?['body/value'])

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