Neither Fried nor Graham would be a particularly strong candidate for Democrats in 2022.
I don't particularly like Val Demings (given that she's a cop), but she would be the strongest statewide candidate for Florida Democrats either in the Governor's race or against Rubio, should she choose to run statewide.
The Democrats really don't have a strong candidate. DeSantis is becoming a strong favorite for re-election. Floridians are NOT unhappy with his COVID-19 policies, and he HAS done a good job of protecting the most vulnerable from COVID-19 while keeping the state less than totally shut down.
I certainly think Gwen Graham is a bit overrated, but she's a better challenger to DeSantis than anyone else. I can't overstate how low a profile Nikki Fried has statewide.