I’m working on a solution to this.
To get the last event image I’m saving the url in input_text, and then I’m using this input_text as the url for a static_image in a “generic camera”, following this example for a dyamic url Template inside a Picture Entity Card - #2 by Noto
Then I’m using a picture-card connected to this generic camera in a lovelace view.
What do you think about it?