[garyrichardson]

This is not a model of working I’m familiar with. I work as collaboratively as possibly with my reports and my manager. 1:1 meetings are my most important. If I’m not discussing the non-obvious challenges we face, we are sharing our goals or tuning our shared vision.

[Wilem82]

Little bit of a contradiction there. You say collaboratively, yet you share your ideas one on one, instead of with the entire team. It's either one or the other.

Next, assuming the challenges you speak of are technical, the manager is no use talking to because they're not an engineer. The manager of course should know of technical difficulties to understand risks of delays, but that works through inviting them to engineer meetings where the team presents its consensus on the matter.