When implementing Privacy and Consent tags through Google Tag Manager, it sometimes helps Support to have access to the preview link to dig deeper into an issue. Below are steps to get your GTM preview link, so it can be shared with others.
1. In your Google Tag Manager account, click on the Container Name.
2. This should bring you to your Workspace. In the top left menu, Click on "Versions"
3. On the right under "Actions", choose "Share Preview" from the drop down menu
4. Copy and paste the preview link an an email to firstname.lastname@example.org or whomever has asked for the link.