Random deindexing

hey all, haven’t touched a site of mine in a minute and no content has changed other than a couple page edits for freshness maybe 40 changes and a deletion of an irrelevant article. any idea as to why my site could be getting deindexed like this: Site was slowly getting indexed for the first couple months, then peaked at about 95% indexed and slowly retracted about 1% per month per the last couple weeks. I have ~760 pages, not sure if that’s impacting any