While girls can use "Hyung" in Korea, it's not as common as using "Oppa" for an older male. "Hyung" is typically used by males to address other males who are older than them.
Here's why it's not as common:
- Cultural Norms: "Oppa" is specifically used by females to address older males, creating a sense of closeness and familiarity.
- Respect: While "Hyung" can be used respectfully, it might not carry the same affectionate undertones as "Oppa."
- Social Context: The choice between "Hyung" and "Oppa" can depend on the relationship between the girl and the older male and the overall social context.
It's important to note that using "Hyung" is not inherently wrong but might be perceived as unconventional or slightly formal in most situations.