I just did a quick search and concluded the same. I wonder if he got it from somewhere before. If you have Twitter account please ask him!

This is a paraphrase of the less technical-sounding: "if you find two ants in the kitchen, you don't have a two-ant problem" which I definitely heard my mom say in the 90s (about actual ants, not metaphorically).

A fortune cookie I suspect.

More seriously, I was also curious. A quick search seems to say the earliest recent source is https://x.com/_NathanCalvin/status/2084856543561093535

[delayed]

People say it in real life about things that are often present in groups and are hard to spot. I most associate it with cockroaches and bedbugs.

It's likely a variation on the saying that, if you see two cockroaches, there are more. Here's a page with that saying from 2013: https://www.weekand.com/home-garden/article/see-two-cockroac...