My old car had a paddle regen break, was pleased to learn that my new Ioniq 5 has a similar feature - in some ways it works better, but others not so much.
Better:
In case you didn't know, you can do a paddle regen (maximum regen, great for preserving battery by slowing down early, for example...
I had the benefit of doing a quick test when someone pulled up behind me last night at a long stop light. From the reflection off their car I could tell Brake Hold keeps the brake lights on until the accelerator pedal is pushed.
Maybe this seems obvious but I was not sure until verified...