@milkinaflask @norcalpaco not the OP but I own both an M3 and a Kia EV6 (sibling to Ioniq5) if you have any questions. The Ioniq 5 should now have access to the Supercharger network (at least the 2025 models with the NACS port) so it will be improved greatly.
Looks like you're on the east coast, check out these YouTube channels for some real world info on charging:
The Ioniq Guy (CT, MA)
State of Charge (NJ)
The Average EV (MD?)
The Network Architect Channel (NC)
RivianTrackr (FL)
@milkinaflask My roadtrips have been primarily limited to a single west coast route but I've done it in both cars and my experience is that I end up picking my charging stops manually regardless and then plugging them into the nav to unlock preconditioning. The Tesla interface is still just better at this, but it's fine in the Kia.
Tesla always wants to take me to V2 sites and I much prefer V3 sites.
@milkinaflask Kia and Hyundai, at least in the older models, require manual updates to the navigation software to get updated POIs which I believe would include charging stations. This is obviously a problem, especially when they promise 2 updates per year and only deliver 1, like last year.
They've made noise about integrating Google's POI API and so they would update automatically but it's unclear if that will come to older models. New model may not have this problem, but I don't know.