Magento 2.3 - Product Export missed few attributes columns

[Aveeva]

After products export few attributes column value not available, how to export all attributes columns ?

[naheedmire215e]

What method are you trying to export attributes columns?
You can export all product attributes by choosing down lists or exporting each attribute in a CSV file. Similarly, you can also do that with the help of an extension named "Magento-2-custom-product-attribute-export."