I’m sorry, i don’t normally post here and just read so I’m not sure if this breaks any rules, just trying to help. I just took this screenshot myself. I left the time stamp for reference. I am in Eastern time zone. I am very familiar with how Instagram works and there are only a few scenarios of how this notification to show up.
1) someone with access to kenzie’s Account followed this account 3 hours from now. You can give apps permission to follow accounts on your behalf, for example, the app will follow any account on Instagram that posts a photo with a certain hashtag.
2) the account followed was previously private and Kenzie had requested to follow prior to disappearance. The fatherless account changed their settings to public 3 hours ago, which would instantly accept all pending follow requests made when the account was private. (Most likely)