on the same page
US /ɑːn ðə seɪm peɪdʒ/
UK /ɑːn ðə seɪm peɪdʒ/

1.
having the same understanding or being in agreement about something
:
•
Let's make sure we're all on the same page before we proceed with the project.
•
After a long discussion, we finally got on the same page about the marketing strategy.