Laravel – Grabbing multiple CarbonPeriod and then continue a while loop with it

So I have this code:

$companyHolidays = Holiday::all();
$newholiday = [];
foreach($companyHolidays as $holiday){
    $newholiday[] = [
        'id' => $holiday->id,
        'title' => $holiday->title,
        'start' => $holiday->start,
        'end' => $holiday->end,
        'parsed_company_holidays' => CarbonPeriod::create($holiday->start, $holiday->end)
    ];
}


$customHoliday = [];
foreach ($newholiday as $holiday) {
   $customHoliday[] = $holiday['parsed_company_holidays']->toArray();
}


   while ($i < $eventRepeats) {

        // add one week
        $eventStart->addDays(7);


        if (in_array($eventStart->translatedFormat('Y-m-d'), $holidaysArray)) {
            continue;
        }

        // todo: this here is the issue
        if (in_array($eventStart->translatedFormat('Y-m-d'), $newholiday)) {
            continue;
        }


        echo '<div class="text-primary font-normal mt-6 mb-2">'.$count++.'. Termin</div>';
        echo '<div class="bg-dark-gray rounded-lg border-l-4">';
        echo '<div class="p-3">';
        echo $eventStart->translatedFormat('l, d. F Y, H:i');
        echo ' - ';
        echo $eventEnd->translatedFormat('H:i');
        echo '</div></div>';

        // increase iteration
        $i++;

    }

if I do dd($customHoliday); I get the following:

Inside it are these:

So for comparing the dates inside the if (in_array($eventStart->translatedFormat('Y-m-d'), $newholiday)) {

it would probably look like the $holidaysArray:

But I cannot figur out how to merge all the arrays and then make the dates inside the $customHoliday comparable like the $holidaysArray (based on YASUMI API)

because I already implemented the holiday API and it continue the loop, if in the array:

if (in_array($eventStart->translatedFormat('Y-m-d'), $holidaysArray)) {
    continue;
}

but with the current way it does not work with this:

if (in_array($eventStart->translatedFormat('Y-m-d'), $newholiday)) {
    continue;
}