Lifespan of EV batteries are getting long enough that replacement isn’t a concern - at least compared to the point where an ICE pretty much self-destructs (>250,000 miles). Tesla is about to announce a major battery breakthrough, indications are battery will last over a million miles (>80% original capacity remaining at that point).
Costs are plummeting too. Replacement battery for a Nissan Leaf 2011-2015 is $5500 ... quite comparable (or better than) cost of repairing an ICE at about the same age/wear. Given that few parts ever need replacing in an EV, that’s cheap. And at that price, vs the price of used Leafs, just go buy a used Leaf with 50,000 miles on it.
If what you say is correct, (there seems to be a fair amount of speculation), you do not need government mandates, the market will do it all without mandates.
The numbers you give seem very far from reality. $5,500 for an engine overhaul? Not even close.
A million miles on a Tesla battery? I hope it is true, but would be a major battery breakthrough.
$5,500 for a new battery. I know I’ve spent WAY more than that on engine repairs for each of my ICE cars. All my EV needed in 2 years was new tires and a cabin air filter.