Foo.php

<?php

namespace App\Models;

use Illuminate\Support\Str;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class Foo extends Model
{
    use HasFactory;

    public $fillable = [
        'uuid'
    ];

    public static function boot()
    {
        parent::boot();

        self::creating(function ($model) {
            $model->uuid = Str::uuid()->toString();
        });
    }

    public function getRouteKeyName()
    {
        return 'uuid';
    }
}