Florida Dems have much more problems than just the white Cubans in Miami.
They lost Duval, Hillsborough, and Osceola counties (Jacksonville, Tampa, and Kissimmee). Charlie Crist also lost West Palm Beach too. These are all areas that Biden won in 2020 even though he still lost the state.
For the past two years, Florida has had a negative natural growth rate (more deaths than births) due to covid, but we've still had an overall growth in population due to pandemic driven migration.
DeSantis peeped game early and realized that even though taking a lax stance towards covid would kill significantly more republicans than democrats, there would be so many like minded people moving here that he'd still come out on top.
The Dems lost every single statewide contest: Governor, Senate, Attorney General, Agriculture Commissioner, and CFO.