Hi,
I would suggest to use the LastSubmit property of your EditForm.
When you submit a new or existing form to a DataSource, you can retrieve it's properties by using the LastSubmit property of the form.
On your flow, use a PowerApps trigger and a 'Ask in PowerApps' variable for the item URL in the mail body.
Then, you flow will expect parameters when it's called from PA :
On your submit button you can do something like :
SubmitForm(EditForm1)
Then on the form OnSucces property :
SendEmailFlow.Run(EditForm1.LastSubmit.{Link to Item})(I am not sure for the {Link to Item} syntaxe, just have a look on a suggested properties availables.
Theo