https://www.steadily.com/blog/everything-you-need-to-know-about-squatter-rights#:~:text=Each%20state%20has%20its%20own,possession%20of%20the%20land%2Fproperty.
So by looking at this, means that basically the property owner ignored their property rights or defense of them for at least 5 years.
If you do not defend or protect your property for over 5 years, is it really your property anymore?
I do not know the particulars of the new Florida law, and how much of it is private versus public law (like if they set up an encampment in a park