This claim is false. Pictures circulated on the internet of thousands of FEMA packages were left by Biden in the southern border. However the picture that was circulating the internet was back in 2011, and has nothing to do with this current issue. The picture was taken in Connecticut during a severe storm. ABC news covered this story, saying, "the claim first appeared on the Facebook page for the group called America's Last Line of Defense." (ABC News) It's no surprise that social media likes to create fake news to keep people interested and entertained, yet it's also easy to search and learn if these claims are true or false.
https://www.10news.com/news/fact-or-fiction/fact-or-fiction-thousands-of-fema-relief-packages-left-at-southern-border-by-biden-administration