Hi there,
Compared to Signal, it’s harder to see which chats have the “unread” indicator. Especially when a chat is muted;
Please consider to:
- increase the contrast of the unread indicator
- make the size of the unread indicator bigger
Or, anything else, to make it easier to spot “unread” chats 
For context: we have a “Read it later” group, which is permanently muted. Since moving from Signal to Delta, everyone is somehow “forgetting” to check/read it. So we were discussing this, and came to the result that it’s simply because people are not noticing the chat has unread messages…
PS. the “sent” and “received” indicators ( ✓ and ✓✓) are also quite hard to see. Remember, not everyone is “young and healthy” 
especially elder people with not as good eyesight cannot see the difference.
Thank you!