Yemen → Dominica
Yemen plugs
Type C
Type D
Type GDominica plugs
Type GShared plug type: G
Compatibility: Compatible
Voltage — Yemen 230V — Dominica 230V
Voltage is the same. Your devices should work normally.
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.