Answer
Look below the user’s name in the Chat screen for a check on their status. If the arrow next to their username is gray, they may have deleted you from their friend list if “Pending…” and never displays delivered.
How to Know If Someone Deleted or Blocked You on Snapchat
How to Know Somebody Has Deleted You on Their Snapchat Friend’s List
How can I tell if someone deleted their Snapchat account?
Look below the user’s name in the Chat screen for a check on their status. If the arrow next to their username is gray, they may have deleted you from their friend list if “Pending…” and never displays delivered.