izyim/app/Classes/Modules/Steps/GetStep.php

<?php

namespace App\Classes\Modules\Steps;

use App\Http\Resources\Step as StepResource;
use App\Models\PrimaryStep;
use App\Models\Step;

class GetStep
{
    public function execute($referenceId){
        $step = PrimaryStep::where('reference_id', $referenceId)->first();
        if($step){
            return new StepResource($step);
        }

        return new StepResource(Step::where('reference_id', $referenceId)->first());
    }
}