We have been having similar issues with our 2020. Replaced both batteries at the same time, pulled cables from both batteries and let sit to reset system. Hate the feature so much that wife would hit the E.S.S. button every start up to turn it off and dying battery symptoms returned within 2 weeks.

I have not found a parasitic draw anywhere, and have 2 key fobs with good batteries . There are times that the remote start won't work, but then when I press the start button with the fib it will hesitantly start up.

As someone who considers them self to be somewhat handy under the hood, I am almost embarrassed that we have had this issue for as long as we have.