How to save morphToMany relationship during create?

insert into `categorizables` (`categorizable_id`, `categorizable_type`, `category_id`) values (?, App\Models\Content, 3)

public function categories() : MorphToMany
    {
        return $this->morphToMany(Category::class, 'categorizable');
    }

Select::make('categories')
->multiple()
->relationship(titleAttribute: 'name')
->createOptionForm([
    TextInput::make('name')
    ->required(),
    TextInput::make('description')
    ->required(),
    Select::make('parent_id')
    ->options(
        Category::get()
            ->pluck('name', 'id')
    )
])
->preload()
->visible(function (Get $get) {
    return $get('type') === 'post';
})