Possibly here for Australian stats: https://www1.health.gov.au/internet/main/publishing.nsf/Content/cda-surveil-ozflu-flucurr.htm
The thing is, not a single poster has considered that a reduction in flu cases is likely a result of the increased hygiene and social distancing practices that we've had to implement for the past 18 months or so, and the generally decent flu vaccine uptake as well.
