You can make an automation with a script to run every time entity is created. Just changed the emoji type from β: grinning :β:
const fibery = context.getService('fibery');
for (const entity of args.currentEntities) {
await fibery.updateEntity(entity.type, entity.id, {
'Icon': ':grinning:'
});
}
Having this built-in feature is similar to: Visual: Database Icons
Is this what you mean?