Optional filter limiting which counters are returned. When omitted, all counters are returned.
Accepts either a comma separated list (counterStatuses=APPROVAL_REPORTS,REVIEW_REPORTS) or a repeated parameter
(counterStatuses=APPROVAL_REPORTS&counterStatuses=REVIEW_REPORTS). A value outside this enum is rejected with 400.

These filter values are not symmetrical with the status field of the returned counters, and deliberately so:
they are the values of the existing ReportCounterType enum, which the legacy report counters endpoint has always
accepted and which other clients already send. Renaming them would be a breaking change for those clients, so the
v1 endpoint takes the same values. Drop the _REPORTS suffix to get the status you will receive, for example
APPROVAL_REPORTS returns "status": "APPROVAL" and TRANSFER_TO_RECIPIENT_REPORTS returns
"status": "TRANSFER_TO_RECIPIENT". The two derived counters, FTG_REPORTS and REPORTS_EXPORTS, are the
exception and are returned under exactly the name you asked for.

The NORMAL and ON_HOLD counters have no filter value of their own, for the same backward compatibility reason.
They are part of the default set and are therefore only returned when the parameter is omitted entirely.