Belgium → Comoros
Belgium plugs
Type C
Type EComoros plugs
Type CType EShared plug types: C, E
Compatibility: Compatible
Voltage — Belgium 230V — Comoros 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.