If you have deps, it’s better to have a direct meeting with both teams in order to resolve mishaps and have a channel of communication setup for that. Daily standup is a poor replacement for that.
This is a good point. I imagine in a more cross-functional team this would become more important.
My current team is essentially front-end only and it's rare that we divide work up such that one person is waiting on another in the same team. If that's a possibility, we tend to pair instead.
...except the people for whom what you have accomplished is a dependency in their work. It can be a direct code change you'd have to merge into your current branch, or something you might want to start using (or finally stop using). It may be even something you have to contemplate on, and it may affect your work much later.
Work of people in a team is inevitably interconnected, and so is work of people in sister teams.