Both <2024-04-04 Do> and [2024-04-04 Do] show up in Agenda-View. Google couldn't really help me on that, and I'm thinking maybe there's a flag I set to include every timestamp in Agenda? I don't know.
For reference, the entries look like this: * TEST <2024-04-04 Do> [2024-04-04 Do] shows as Thu 4 Apr 2024 TEST [ TEST Yes, there's no closing square bracket.