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Like others have said, usually there’s a bolt on the underside, but I have trouble seeing it in this picture. In some faucets (also some Grohe) there’s an Allen inside the faucet. Remove the spout by loosening the ring around the spout and there should be a threaded rod in which fits an Allen key.
Same here. But sadly too many people were swayed by the populist parties and their ‘this one trick will fix everything’ rhetoric.