on the same page
/ɒn ðə ˌseɪm ˈpeɪdʒ/phrase
agreeing about something or understanding it in the same way
на одной волне, понимать друг друга одинаково
“Before the meeting, let’s make sure we’re all on the same page.”
“The parents weren’t on the same page about bedtime.”
“Good, so we’re on the same page.”