The 120hz display on my Note 20 Ultra is awesome. So Samsung can manage to pull it off just fine. Whats that say about Apple? They are Samsung made displays literally handed to them and they still cant make them work.
They use an LTPO panel, that’s why it works awesome. (The LTPO technology is being developed by Apple btw)
For some reason Apple will use it till the 2021 iPhones.