A manager usually has several distinct projects in the air, with ICs working on them in groups of 1-3. Someone's work isn't relevant to you just because you report to the same manager. The "team" for standup, sprint planing, etc. is really several teams, each tuning out while the others speak. And because small groups can communicate fine informally, the relevant-seeming part of the team-level ritual is always a rehash of what the project staff already know.

That sounds like a bad structure then. Standups ought to be for the teams of small groups, not the convenience of the manager.