Sending a notification to user after user approval by admin

Hello freinds,

I built a membership form on my website with your Forminator plugin and configured two automatic notifications, one to inform the admin that there is a new membership request that
has just been received and must be processed, and another which informs the user that their membership request is being processed.

For the moment if the admin, after receiving notification of receipt of the new membership request, validates this submission, the WordPress notification system sends the email below
to the user informing them of the activation of their account:
[ Dear User,
Your [Website Name] account has been successfully activated. Please find your credentials below.
Login page: https://domain.com/?redirect_to=https://domain.com/account/
Identifier: [User lastname]
Password: Use the password that you submitted when registering your account, or set a new password at the link below.
https://domain.com/wp-login.php?action=rp&key=LsPj3I5INgpZniT6XyrK&login=User
This message is sent by https://domain.com]

But what I want, in addition to the native WordPress notification sent, is to create a third notification specific to Forminator in its “Email Notifications” module, which should be
sent only after validation of the request submission membership by the admin in the backend, that is to say after the admin clicks on the “Approve user” button located at the very
bottom of the submission in question.

The problem is that in the configuration of this notification and more precisely in the Conditions tab, I do not know how to add a rule which conditions the sending of this
notification by the validation of the submission.

Hoping you understood my request, please help me find a solution to this problem.

Sincerely,

I. SEKKAI