The Bible does not make much provision for true
prophecy that doesn’t come true.
Deut 18 indicates failed prophecy is a mark of false
This is characteristic of biblical teaching elsewhere: 1
Kings 22, Isaiah 42-46, Jeremiah 28.
The book of Jonah does allow that a disaster prophecy
might be postponed if the people repent.
Presumably the same might happen with a prophecy of
blessing if the recipients became arrogant.