It appears that Joaquin Buckley was once scheduled to face off against Alex Pereira. However, the fight ultimately did not take place.
Reports suggest that the reason behind the cancellation was an issue on “Poatan’s” side. Details about the specific problems remain unclear, but it was enough to prevent the matchup from happening.
https://www.sportskeeda.com/mma/news-i-planning-knocking-man-out-joaquin-buckley-calls-alex-pereira-passing-short-notice-fight-2022