I ordered an ifixit battery kit for my Pixel 4a because of the google battery fiasco. Right after the update I had all the battery warnings and my pixel had just a few hours of battery life, so my phone was among those impacted by the update. Received the battery kit today, did the battery replacement. No more warning sign on top of the battery icon. No more Push notification telling me about a replacement. The battery no longer drains dramatically on idle, it just feels brand new. Hope this helps!