Recipes

Four questions, start to finish. Each gives the order to call the tools in, what to check at each step, and where the answer comes from.

Recipe	The question behind it
Why are my bundles not showing?	Shoppers should be seeing a bundle and are not
Which offers are earning?	Where the extra revenue actually comes from
How is this offer set up?	Reading back one offer's configuration
Why did my offers stop mid-month?	Everything worked, then it didn't, and nobody changed anything

The shape they share

Start with the tool that reaches a conclusion. get_setup_status hands back a verdict with reasons; reading it first usually ends the investigation in one call.
Separate "not configured" from "not visible". An offer's status and whether a shopper can see it are two different questions with two different tools. Most confusion here comes from answering one and believing you answered the other.
Watch the default limit. get_offers returns 10 unless you ask for more, and says nothing about it. Any answer that counts offers should have named a limit.
Take the store's word for the units. Revenue comes back in USD with a currency field saying so. Read it before comparing against your own dashboard.
Say what was not checked. A skipped step, a default that was taken, or a range that was assumed belongs in the answer.