Hi @Bberger1,
If it is not showing up you can as a workaround use a Send an HTTP request to SharePoint action to update the item after creating it. That action should support updating an Image column.
Below is an example
In this sample I assume your MS Forms is a personal one. In that case all uploaded files would be stored in the OneDrive of the person who created the form. That direct link cannot be used in the Image column, that's why I am copying it to a SharePoint library instead before using it in an image column.
1. Get File metadata using the question id of the Bild hochladen question
first(json(outputs('Get_response_details')?['body/r76dd09f186484e3587d685c8f71a60de']))['id']
2. Send an HTTP request uses the below
a. URI
_api/web/lists/getbytitle('@{variables('ListName')}')/items(@{outputs('Create_item')?['body/ID']})
b. Headers (I am using nometadata headers, this way you don't have to figure out the ListItemEntityTypeFullName value 😁)
{
"Accept": "application/json;odata=nometadata",
"Content-Type": "application/json;odata=nometadata",
"If-Match": "*",
"X-HTTP-Method": "MERGE"
}
c. Body (make sure you change the serverUrl and ServerRelativeUrl values)
{"Bild": "{\"type\":\"thumbnail\",\"fileName\":\"@{outputs('Copy_file')?['body/Name']}\",\"fieldName\":\"Bild\",\"serverUrl\":\"https://contoso.sharepoint.com\",\"serverRelativeUrl\":\"/sites/PowerUsers@{outputs('Copy_file')?['body/Path']}\"}"
}

The result should look like the below
