The pen holder will not hold the OEM pen and you have to pay out of your pocket to ship them back.
Response from TargusBy Targus Support, February 13, 2024
Hello, this case should fit the OEM stylus. Can you confirm if you have the Samsung Galaxy Tab Active Pro or the Tab Active Pro 4? Our customer support team can be reached at 877-482-7487 Monday thru Friday 10 AM to 7 PM EST. They will be happy to look into this for you further.