> As a Sr SWE (~5-6 years of experience) - you're expected to have an influence on the direction of an entire team. You have input into setting OKRs and idea generation is expected for this level (especially at Amazon, not as much at G from what I've seen).

FWIW as a non-yet-Senior-SWE at Google, I have input and influence in OKRs both for myself and others on the team. This depends a lot on the particular work though. I work on internal infra, which is driven less by PMs and external market things, and much more by engineers proactively identifying areas for technical improvement and user pain.