It appears that Joaquin Buckley was once scheduled to face off against Alex Pereira. However, the fight never came to fruition.
Reports suggest that the primary reason for the bout falling through was an issue on “Poatan’s” side. Details about the specific problem remain unclear, but it ultimately prevented the matchup from taking place.
https://www.sportskeeda.com/mma/news-i-planning-knocking-man-out-joaquin-buckley-calls-alex-pereira-passing-short-notice-fight-2022