When defining a date or datetime cast, you may also specify the date's format. This format will be used when the model is serialized to an array or JSON.
Note the last part, only when serialized to array or JSON.
My english is so bad, and maybe I'm wrong for that.
Alternatively, now that Livewire now supports model casters for model properties, you can actually cast the >date field itself and avoid the accessor/mutator pattern all-together:
protected $casts => ['date' => 'date:m/d/Y'];
And now replace any date_for_editing references to just date and everything should work nicely.