“Of course. Here you are.”
Here you are. commonly accompanies handing something to a customer. The sommelier is giving the customer a glass of wine. Here you go. is a slightly more casual alternative.
B1-33 / CEFR B1 / EPISODE 33
Choosing a quantity after tasting a wine
SceneFrank is at a wine tasting. A friend recommended a white wine from a small mountain winery.

WORDS & CONTEXT
Here you are. commonly accompanies handing something to a customer. The sommelier is giving the customer a glass of wine. Here you go. is a slightly more casual alternative.