Can you apply for a COE while waiting for a tourist visa approval in the US?

The general consensus among respondents indicates that, in the US, you must first have your tourist visa approved before you can apply for the Certificate of Entry (COE). Several comments mention that approval of the visa is necessary to move forward with the COE application, which requires you to submit a copy of the visa along with other documentation like flight and hotel information. However, a different experience was shared by a commenter from Canada, who successfully applied for the COE before receiving their visa, receiving COE approval soon after uploading the visa details. Overall, it seems that the application process may vary by country, particularly between the US and Canada.