Define the open question
Instead of asking the child to invent the entire screen policy, offer a specific decision: which approved activity fits the evening, where to save requests, or how much notice helps before stopping a project. Tell them what is already settled, such as a scheduled departure time. Avoid staging a vote on a boundary you intend to override regardless of the result. A smaller genuine choice is more respectful than a broad question whose answer has no effect.
Listen for information you do not have
The child may know that a game cannot save at the point you chose or that a group activity starts at a fixed time. Ask them to show you the relevant part where appropriate. That information can improve the arrangement without deciding the outcome automatically. Explain your own constraints in language they can understand. Keep confidential adult matters private; the child only needs enough context to see why the family cannot accommodate every preference.
Show where their input changed the plan
Name the detail you adopted, such as giving a reminder before a new round rather than during it. If you decline a suggestion, explain the reason and identify any alternative you can offer. Revisit the arrangement after trying it instead of treating the conversation as a one-time consultation. The aim is a plan the child can understand and help carry out, while the adults remain accountable for the decisions that belong to them.