Mayotte → South Korea
Mayotte plugs
Type C
Type ESouth Korea plugs
Type C
Type FShared plug type: C
Compatibility: Compatible
Voltage — Mayotte 230V — South Korea 220V
Voltage difference is small. Most electronics will work safely.
Device compatibility (phones)
Phones almost always support 100–240V, so yours should work safely. Check your charger label to confirm.
You likely only need a plug adapter (if socket shapes differ). Voltage is close between these countries.