Any concerns you have, are of course valid!
Tech companies? A few points.
ISE’s are hardly limited to tech companies. They work in several fields. Some of those other fields would likely be more open to international students (logistics, manufacturing, etc). Don’t limit your range of possible options. My daughter had two internships, in two different fields, and ended up taking a job in a 3rd (manufacturing).
I recommend you use LinkedIn. Look up each of these Universities. Then select “Alumni”. You can now view information such where they live, where they work, what they do and what they studied. You can sort the data, for example, under what they studied, by selecting Industrial Engineering (and Engineering/Industrial Management).
Florida is the 3rd most populous state, behind California and Texas. It has no shortage of jobs, including those in the tech field. However, there is a good chance, no matter which of these three schools you attend, that you end up working in another state. All three are well recruited nationally. You can see that in the LinkedIn information.
You may want to reach out to the UF International Center and UF career resource center with your questions about international student/work visas.
Good Luck!