Try this
- Name the short work-free period and check whether either person has a real interruption to expect.
- Close or set aside screens for the agreed portion. If work intervenes, state it instead of silently leaving the shared arrangement.
A worked example
“Could we close our screens for the first ten minutes of lunch?”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
If an urgent task interrupts, say so plainly rather than silently dividing attention.