
zukf5 (zukf5) asked a question.
Password Reset Mail Not Sending
When users want to login or signup, they use the universal login, press the password reset button and enter their mail, it then sends then a confirmation that password has been sent but no email appears in the mail

Good Morning,
Great question. I will refer you here to a similar question that was posed and with good reply from support.
Password reset email is not being sent to users
Looks like the recommended action is a support ticket, mainly due to the variety of reasons this could be occurring (anything from the individual user to a larger email and/or Okta related issue). Support should be able to provide a deeper look into the issue and provide a root cause.
Also take a look at this article, which also suggests a ticket to support in case the specific email has been blocked due to a previous bounce.
Activation and password reset emails from Okta is not being sent to a specific user
Finally, in some cases your ability to access email is actually tied to Okta, such as sometimes the case with O365. If they are using secondary email, or personal email, then the below would be useful reference to allow that.
How do I allow end users to receive password reset or activation notifications in a secondary email address?
And a point on the SSPR feature:
Self-service password reset/Account unlock: What if the user’s email is not in Okta