Impressions usually get chopped because relevance gets tightened. It’s really not a great high level metric. Growing I impressions doesn’t mean rising clicks - rising rank positions does
So to that end - what about your SERP reports? Are you positions set?
Secondly - why not look at the last 7 days v 7 days and look at what pages/keywords lost position/rank?
Unlike TikTok or insta, Google doesn’t try to find audiences for your content - so it’s has to be possible to judge/identify ?