Notification API error

I have enabled Notification API from engage and still getting Notification API is disabled

When is the bot created?
Notification APIs are disabled for Bots created on or after 1st of Aug 2023 as we recommend to make use of Flow campaigns for the same.

Starting from August 1, 2023, access to Notification APIs has been shifted to an on-demand model. This means that these APIs will no longer be available by default for bots created on or after August 1, 2023.

Please check the note mentioned in the doc.