How can I count from two tables in my eloquent query?

@Sergiu17 Thanks for your reply, I already checked this docs. However, I cannot change the structure of my query, so, is there any possibilities get the count within this query structure?

@Syed1980 add ->withCount('customers')

https://laravel.com/docs/9.x/eloquent-relationships#relationship-counting-and-custom-select-statements

@Tray2 Thank you, I added ->withCount('customers') to my code like this...

$this->linked = $this->linked->join('customers', 'linkeds.customer_id', '=', 'customers.id')
->where('customer_name', $customer_name)->get()->withCount('linkeds.customer_id');

I'm getting below error.

"Method Illuminate\Database\Eloquent\Collection::withCount does not exist."

I also tried giving this before ->get(), like this...

$this->linked = $this->linked->join('customers', 'linkeds.customer_id', '=', 'customers.id')
->where('customer_name', $customer_name)->withCount('linkeds.customer_id')->get();

I'm getting below error.

"Call to undefined method App\Models\Linked::linkeds()"

Am I doing it in the right way?