🕳️When trying to view my service, I've got an error 404, product not found

It can be a few things.

Possible reason 1 : your product is still in draft mode. How to fix it : Make sure the status of your product is not on draft mode

Possible reason 2 : you have deleted the product that originally was connected to the service How to fix it : create another product on Shopify then click on My Services>Edit>Change product and connect it to your new product. If when you click on "Edit" you see a big grey rectangle instead of your product name. It means that the original product does not exist anymore.