Yes. This is going to be a longer process. This newly added Image property did not show up in getting Properties for files action. Please refer to the process below...
STEP 1: Use HTTP Action and query library with expand clause.

STEP 2: Run this much flow and capture the output and save it in notepad.
STEP 3: Add Parse JSON. Now use the above-generated output to generate Schema.

STEP 4: In the output, you will find your new column. Capture JSON generated. Mine looks like below.
{"type":"thumbnail","fileName":"PRFBaner.jpg","nativeFile":{},"fieldName":"Test","serverUrl":"https://XXXXXX.sharepoint.com","serverRelativeUrl":"/sites/PNP/SiteAssets/Lists/5e3d6008-ace7-4b8d-a677-6cade2b77b98/PRFBaner.jpg","id":"92c1dd68-62a2-48dc-9d7e-40a5ec3d8f87"}
So Add Parse JSON again to parse this one and then use ServerURL and ServerRelativeURL to form a final URL that you can use in your adaptive card.
