Image Converter community plugin can crop images using right click menu although it doesn’t offer non-destructive image cropping i.e. you cannot undo the process afterwards. Usually imported files in Obsidian are copied to your vault so your original file is protected. In some cases importing from clipboard can be irreversible in a sense that you cannot retrieve the original content that was in your clipboard earlier.
I was gonna mention the same thing but I realized OP might have an Excalidraw image/md file.
@masterjack Write the post in Italian if that is your mother tongue, have it translated with Gemini and put the translation here so people can better understand you in order to be able to help you. Cheers