I think the solution is pretty simple, if we assume it is about the environment:
All they have to do is implement a “include a charger” / “do not include a charger” selection in the checkout process. In countries like Brazil, make the default selection to include. In other countries, there could be no default, but the choice is mandatory.
If they want money to be involved, they could charge $19 to include it, or discount by $19 to exclude it, whichever way they want to go. If environment is the narrative, it’s probably best to just have it not change the price regardless of choice.
As for backdating to 2020 - they can just create a site where you can request a charger if needed.