Your IT only provides us with with your product data via csv file.
Creating such files is standard today and will not pose any major problems to your IT.
Decisive is your reaction time when delivering the purchased items.
Since we already specify the delivery times agreed with you in the product advertisements, absolute reliability is necessary here.
The non-compliance with the delivery deadline is today rated very negatively in review sites.
The general rule:
Long delivery times = less sales
Negative Ratings = less sales
If you have standard packaging sizes: It may happen that order quantities differ from your standard sizes. You should be flexible and ready to deliver the exact order quantity.