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As you want to get a product collection then you need to get first current data start & end time.

So you can try below

$todayStartOfDayDate = $this->_localeDate->date()->setTime(0, 0, 0)->format('Y-m-d H:i:s');
$todayEndOfDayDate = $this->_localeDate->date()->setTime(23, 59, 59)->format('Y-m-d H:i:s');

Then using news_from_date and news_to_date fields ,you need to filter collection current data start and end time with date format (Y-m-d H:i:s);

Collection filter should be like this:

   $collection->addStoreFilter()->addAttributeToFilter(
            'news_from_date',
            [
                'or' => [
                    0 => ['date' => true, 'to' => $todayEndOfDayDate],
                    1 => ['is' => new \Zend_Db_Expr('null')],
                ]
            ],
            'left'
        )->addAttributeToFilter(
            'news_to_date',
            [
                'or' => [
                    0 => ['date' => true, 'from' => $todayStartOfDayDate],
                    1 => ['is' => new \Zend_Db_Expr('null')],
                ]
            ],
            'left'
        )->addAttributeToFilter(
            [
                ['attribute' => 'news_from_date', 'is' => new \Zend_Db_Expr('not null')],
                ['attribute' => 'news_to_date', 'is' => new \Zend_Db_Expr('not null')],
            ]
        )

See More at class Magento\Catalog\Block\Product\New Block at Magento2.

You Can use this block for ur purpose