The meaning of ‘tuck in’ used in this context is British English and is commonly used in many Commonwealth countries. In addition, ‘tucker’ means ‘food’ in Australia. 👍😉

tuck in [also ‘tuck into something’] = to start eating something enthusiastically
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Has anyone ever told you to ‘tuck in’? Where were you and what kind of meal was it? 🍽🥙
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