Bikeshedding (see wikipedia) is the way to say when someone focus on unnecessary details when there are bigger problems that matters much more attention. It is called bikeshedding because it’s like when someone debating about how the bike shed should be designed in a nuclear plant.
One occassion I notice recently is when project manager taking votes for small decisions. Like whether we should make the color of the website blue or red, or etc., when we dont even know what it is for yet.
There are a few ways it can manifest. One form is “what ifs”. Some what ifs goes to one level of detail too low from the main discussion. It might be actual valuable concern, but it might not be the right time to discuss about it. Assuming a capable team, that what ifs should always have a reasonable way to be solved.
I think it’s useful just to be aware of it and think about it. Having this “bikeshed” labelling gives us power to focus on the most important matters.