Hi @SGH ,
I'm afraid there is currently no way to migrate Microsoft list to a SharePoint Online site. As per my test, I tried "save list as template" but this way has been deprecated now. Also I tried other ways like "Export to Excel" and design a Power Automate flow, neither of these ways works for lists with an image column. In this case, I would suggest going to find 3rd party migration solution which meets this requirement.
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