Hi Imogen,
Thanks for your help. I did do a restructuring of my permalinks about 1-2 months back and tried to do a mass redirect. I'm not sure if that could have affected this. But the stats I shared above are actually referring to my home URL so not any specific page/post.
I took a look at the link you shared, and it seems like my "Site Health" on NicheIQ is already enabled.