Is it permissible to offer digital and non-digital products for sale online during Friday prayer, knowing that the seller is not preoccupied from the prayer, and the sale occurs automatically without his direct intervention?

The reason for the prohibition of selling at the time of the Friday prayer is that it prevents one from hastening to it. For this reason, selling is permissible for those upon whom the Friday prayer is not obligatory. There is no harm in displaying products on the website for purchase by those upon whom the Friday prayer is not obligatory, or by those whose time differs, as the website is the one conducting the sale. And if someone upon whom the Friday prayer is obligatory buys from you during the time of the prohibition, there is no sin upon you due to your lack of knowledge.