Hi anonymous user , so sorry for the delay in response! From my understanding you're looking at the "Phone_Email_Base.xml" file, correct?
You would first need to set up a password reset flow. Within your XML you now need to add the following claim under <ClaimsSchema>
<ClaimType Id="isForgotPassword">
<DisplayName>isForgotPassword</DisplayName>
<DataType>boolean</DataType>
<AdminHelpText>Whether the user has selected Forgot your Password</AdminHelpText>
</ClaimType>
From there, you would just need to follow the document to make sure everything is setup properly. Please let me know if you've tried this already or if you get stuck.
If this answer helped you please mark it as "Verified" so other users can reference it.
Thank you,
James