Here's the text from the Sunpass website that's probably been on the website for the past several years (since mid 2018 for sure):
SunPass transponders also work in Georgia and North Carolina with more states coming soon.
I am not entirely sure why the toll systems in the US have decided not to follow the federal law requiring them to achieve interoperabilty. I assume Sunpass (with all its problems) does not meet the minimum standards set forth by the EZPass group. It's a set of rules that does not allow for fraud, so it's not in tune to Florida business practices.
