If you want to rename "pivot" word and call your relationship something else, you just use ->as('name')
in your relationship.
Model:
public function podcasts() { return $this->belongsToMany(Podcast::class) ->as('subscription') ->withTimestamps();}
Controller:
$podcasts = $user->podcasts();foreach ($podcasts as $podcast) { // instead of $podcast->pivot->created_at ... echo $podcast->subscription->created_at;}