stuff.php

$validWiths = [
    'a' => 'a',
    'b' => 'b',
    'translated' => static function ($query) {
        $query->withTrashed();
    }
];

$with = $request->get('with');
$mealQuery = \App\Meal::query();

if ($with !== null) {
    $withValue = array_filter(
        array_map(
            static function ($withValue) use ($validWiths) {
                return $validWiths[$withValue] ?? null;
            },
            (array)$with
        )
    );

    if (!empty($withValue)) {
        $mealQuery = $mealQuery->with($withValue);
    }
}

$meals = $mealQuery->withTrashed()
    ->where('created_at', '>', $timeTo)
    ->orWhere('updated_at', '>', $timeTo)
    ->orWhere('deleted_at', '>', $timeTo)
    ->get();