Facebook Still Tracking

Am I being paranoid?

When Apple gave the option to stop FB tracking I went with it & have since double checked the settings.

But recently here & there I seem to get ads that out of the blue are linked to something I googled.

Today this happened again. I searched google for a replacement vacuum filter & a few hours later an ad for this company has popped up on FB.

I again checked my settings under Off FB Activity & nothing is showing

Am I missing something?