Seems unlikely. Do sinkholes occur on barrier islands?
Over the last several years, residents in Miami had seen sinkholes of different sizes. Here are some of the sinkhole incidents in the area:
August 2013 – A sinkhole formed after a main water line between 84 and 85 streets in Miami Beach broke. It also caused a water outage for 500 customers.
October 2015 – A sinkhole formed on a busy roadway at Southwest 27th Avenue, located between the Sixth and Seventh Streets. It looked small at first but upon inspection, it extended through three lanes.
October 2015 – A sinkhole opened due to a broken service line from the Four Points by Sheraton Miami Beach Hotel located at 4343 Collins Avenue. Northbound traffic on Collins Avenue was diverted at 41st Street, while the 44th Street was closed.
August 2016 – Because of a broken water line, two massive holes opened in the southbound lanes of Florida’s Turnpike, near Hard Rock Stadium, prompting the officials to close lanes and two exits.
October 2016 – A sinkhole opened on 41st Street and Royal Palm Avenue, near the Julia Tuttle Causeway. The cause might be the severe weather at Miami-Dade.
November 2017 – A sinkhole opened at the intersection of Flagler and 107th Avenue.
https://sinkholemaps.com/resources/miami-sinkholes-what-you-should-know-before-moving-to-miami-fl/