I'm pretty familiar with parts of northern Iowa.
The vehicle I reference most for hypothetical road trips is the Chevrolet Bolt, which has advertised somewhere around 250miles on a full charge, and is one of the more affordable new EVs.
If one wanted to take a drive across northern Iowa, roughly following 9, starting from Lansing and going west, if I'm not mistaken you'd encounter public charging in Decorah, and then you'd be able to choose from options in Mason City and maybe Clear Lake, then Estherville, then Rock Rapids, and from there you're practically in Dakota and Sioux Falls.
Breaking it down, plugging in generic towns into Google:
Lansing to Decorah: 35miles
Decorah to Clear Lake: 92miles
Mason City (which looks like the more likely stop than Clear Lake, it's closer to Decorah) to Estherville: 100 miles
Estherville to Rock Rapids: 70 miles
Rock Rapids to Sioux Falls: 32 miles
Each of those chunks is more than manageable for a Bolt. But your next argument would be that winter temperatures would make that impossible. So at some point in March or April into October or November, I don't think you can contest that it would be manageable.
Public fast chargers in/near Riceville, Buffalo Center, and Spirit Lake would, IMHO, make range anxiety on such a trip a non-factor for all but the coldest of cold snaps. Even without them, I would be pretty confident that a Bolt could make this trip through a typical northern Iowa winter day.