Enhanced Conversion is a feature in Google Tag Manager (GTM) Server-Side that allows for more accurate conversion tracking by sending additional user data to Google Ads. This data helps in attributing conversions more precisely to the ads that drove them.

To ensure that user_data parameters are managed in GTM Server-Side for Enhanced Conversion, you need to check your Google Ads (GAds) settings. If the configuration is at the account level, there should be no issues. However, if the configuration is only at the conversion level, the GTM Server-Side tag will not manage the user_data parameters. You can verify this by looking for the em=tv.1~em parameter in your tracking setup.

If Enhanced Conversion user_data is not being sent, despite Tag Assistant indicating that tags have fired, you should check for the presence of the em=tv.1~em parameter in your tracking setup. This can be confirmed by reviewing the documentation and the link provided in the first comment of the post.

If you have Google Ads with only detail conversion settings that do not manage user_data, the temporary solution is to use the GTM Client Side Tag for Google Ads Conversion tracking. This will allow you to continue tracking conversions until a more permanent solution is provided.

To provide feedback to Google about issues with Enhanced Conversion, you can go to the Google Ads interface, click on the Help menu, select 'Leave a Feedback', and then choose 'Report An Issue'. This allows you to send your feedback directly to Google for consideration.