In order for your responses to be shared with your customer, you must click on Submit Items to send your RFQ submissions.
The Submit Items modal will appear for you to confirm that you want to submit your responses. Be sure to verify if "Partial Responses" are accepted within the RFQ Details if submitting incomplete responses. Click on Confirm to finish submitting your responses.
After submitting, you can use the Filter actions dropdown to "Show Not-Submitted Only Items". This helps you to easily see if any lines were not submitted.