Contact the embassy
Africa East/Southern
Verify an issued Comoros visa
No official online check exists; verify through the embassy that serves Bangladesh.
No online check — contact the embassy
Comoros has no official online way to check a visa. To confirm a status, contact the Comoros mission that serves Bangladesh.
No mission found in Dhaka or accredited to Bangladesh in any source checked. Comoros has no mission in South Asia per Wikipedia list of Comoros missions.