Just a quick bit of napkin maths on the ioniq5 - it’s quite famously one of the faster ones to charge / decent range.

Assuming by the numbers on google are correct

Range of the car is 354 miles (let’s say 350) Car can charge from 10% to 80% in 18 min (let’s say 30 min)

That means it’ll go from 35 miles of range to 280 - giving it range of 245 miles.

If you drive 70 MPH for 3.5hr and take a 30 min break you cover 245 miles every 4 hours.

Which means you can realistically achieve what you are looking for in just under 20 hours.

This assumes every 4 hours you encounter somewhere with a fast charger capable of what you need.

This is all highly theoretical and completely dependant on where you’re driving, but the range is possible.

On a more realistic note, 1200 miles!?! Good lord my legs would be so cramped I wouldn’t be able to walk for days! Good luck with the next trip