The purport of sloka 213 of chapter 18 of the Madhya-khanda of Sri Chaitanya-Charitamrita reads
The word yavana means "meat-eater." Anyone from a meat-eating community is called a yavana. One who does not strictly observe the Vedic regulative principles is called a mleccha. These words do not refer to any particular man. Even if a person is born in a brāhmaṇa, kṣatriya, vaiśya or śūdra family, he is a mleccha or yavana if he does not strictly follow the regulative principles or if he eats meat.(Ref: https://prabhupadabooks.com/cc/madhya/18?page=3&d=1)
The sanskritdictionary.com gives the meaning of the word 'yavana' as
यवनः [यु-युच्] 1 A Greek, an Ionian. -2 Any foreigner, or barbarian; Ms.1.44; (the word is applied at present to a Mahomedan or a European also). -3 A carrot. -4 Olibanum. -5 A courser or swift horse. -6 Speed. -7 Wheat. -8 A kind of grass. -नाः (m. pl.) 1 The Ionians or Greeks. -2 The Greek astrologers. -नम् Mixing, mingling (esp. with water). -Comp. -अरिः N. of Kṛiṣṇa. -आचार्यः the reputed author of astronomical book called Tājak. -इष्टः 1 a kind of garlic. -2 a kind of onion. -3 the Nimba tree. (-ष्टा) the wild date-tree. (-ष्टम्) 1 lead. -2 an onion or garlic. -3 pepper. -देशजम् benzoin. -द्विष्टः bdellium. -प्रियम् pepper.
Does any of the scriptures say that meat-eaters are 'yavana-s'?