This was partly covered in another thread – so some of what I am about to say I have said elsewhere.
I suspect all EVs will have the ability to show the regen on the dash in real time – either numbers or bar often green and red depicting energy used and energy put back – regen.
In the early days of having the Kona I found this particularly useful as I could see exactly how what I did affected the energy used and regen.
It made me realise I often had my foot on the accelerator when I could have coasted more – ie using less energy.
The same with braking – finding the sweet spot comeing upto lights or junction.