'Here you are.' does it exist in Korean same meaning idiom phrase which sounds natural?
here you are

'Here you are' (idiomatic) Said when you hand something over to someone or do a favour to them, usually to draw the recipient's attention to the exchange; Equivalent to “thank you” when receiving something. Sometime is also used as an offer like while share some food. So if so want to be polite to my friend while share snack or treat with something how I can express this in Korean? ...hmm like feel free to use or help yourself to... In advance thank you for any suggests.

Question

'Here you are.' does it exist in Korean same meaning idiom phrase which sounds natural?
here you are

'Here you are' (idiomatic) Said when you hand something over to someone or do a favour to them, usually to draw the recipient's attention to the exchange; Equivalent to “thank you” when receiving something. Sometime is also used as an offer like while share some food. So if so want to be polite to my friend while share snack or treat with something how I can express this in Korean? ...hmm like feel free to use or help yourself to... In advance thank you for any suggests.

Answer

There are many different phrases in Korean rather than one like "Here you are." that is very widely used.

* when you hand something over to your friend:
- 자, 이거 (받아) / 자, 이거 (받으세요).  Here you are.
- 자, 여깄어 (= 여기 있어) / 자, 여깄어요.  Look, here!
- 자, 여기 / 자, 여기요.  (same, just shorter)

* server to customer at a restaurant, coffee shop, etc:
- (음식 / 음료) 나왔습니다.  Here you are / Your order is ready.
- (a name of a dish / 커피, etc) 나왔습니다. 맛있게 드세요. (same but more friendly)

* when you offer food at home:
- 자, 많이 먹어 / 자 많이 드세요.  Feel free and help yourself.
- 자, 맛있게 먹어 / 자 맛있게 드세요.  (same) Go ahead and have a delicious meal.
- 어려워 말고 많이 먹어 / 어려워 말고 많이 드세요. Don't be shy and help yourself.
('많이' in these phrases are more like "without holding back; freely" than "a lot")

* Thank you:
- 고마워 / 고맙습니다. Thanks.  (more informal)
- 감사해 / 감사해요 / 감사합니다. Thank you. (more formal) - 감사해(요) is used much less.