I personally don't understand the flawed logic about how if Car A has some specific feature then why is Car B lacking it--i.e., why can't Car B come with the same feature(s) that's offered in Car A? Hey the Ioniq 5 has the panoramic moonroof, how come the EV6 doesn't offer it? Hey, the Ioniq 5 has a magnetic pad where you can attach stuff to it, how come the EV6 doesn't have one? Hey, Hyundai offers 3 years of unlimited EA DCFC charging (limited to 30 minutes per charging session), how come Kia offers only 1000 kWh of free charging with the EV6? Regardless of the fact that both the Ioniq 5 and EV6 are built on the same E-GMP platform they are not completely identical to each other when it comes to features. I get it--yes it would be nice if the EV6 had some of the features offered in the Ioniq 5 (and vice-versa) but to argue that if the Ioniq 5 offers it then there's no reason why it can't be offered in the EV6 is a bit silly IMHO. And oh BTW--IIRC the (U.S.) EV6 includes the V2L adapter but the Ioniq 5 doesn't include it, so it can go both ways.
If any/all of those Ioniq 5-only features are that important to you, then maybe you should have just bought an Ioniq 5 instead. Wishing that a feature was available in the EV6 is one thing, but complaining about how come the EV6 doesn't have it even though the Ioniq 5 has it is pointless--in the end you are comparing apples to oranges.