Images in channel's Sharepoint storage not rendering in teams adaptive cards

Hello, we are trying to display images stored in Sharepoint in a teams adaptive card. The image will not display until the user has clicked on the 'files' tab for the channel. It returns with a 401, so Im guessing this initiates some kind of auth process. When they click on the files tab and return to the messages, the images are rendered as expected. We need to have security around our images, so we don't want to store them in another setting that might not have team-level authorization.

Is there any way to make the sharepoint images show without clicking on the files tab first, such as triggering the sharepoint auth process programmatically?

This is the image url format we are using: 
https://myaccount.sharepoint.com/sites/DefaultDirectory/Shared%20Documents%2FGeneral%2Fmy-notifications/2023-12-06T20.png

The other issue is that Sharepoint images do not display in 'New Teams' at all. Is this a known issue with New Teams?

Thank you for your help.

Daniel