While "muck" deals with the taboo of filth, while "fuck" deals with the taboo of sex, the two verbs can be used similarly in some circumstances in Australian English. For example "muck up", "muck about" and "Quarantine matters! Don't muck with it.".
In Australian English, is "muck" used because of its similar pronunciation with "fuck" while being more acceptable?
Wikipedia mentions that Ernest Hemingway, who isn't Australian, used "muck" as a minced profanity, but doesn't say whether or not it's a one-off thing.