Issues Understanding Menu Sync Workflow Between POS and Channels

Hi everyone,
I’m currently working on an integration and I’m having trouble understanding the full menu-sync workflow between a POS system and different delivery channels through Deliverect.

I’ve read the documentation, but I’m still confused about a few things:

When a product is updated in the POS, how exactly does Deliverect detect and propagate that change?

What triggers a menu re-publish, and is there a recommended sequence when pushing large updates?

Is there a safe way to test menu changes in staging without accidentally triggering unintended updates on the production side?

I feel like I’m missing one step in the chain — kind of like the moment in snake game when you forget to turn soon enough and suddenly the whole structure collapses. I’d love some clarity on how to keep everything “moving smoothly” without causing conflicts.

Any guidance, examples, or best practices would be really appreciated.
Thanks in advance!