I am not sure which Meta apps open ports, but e.g. Samsung phones come with a bunch of Meta apps pre-shipped. IIRC just removing the Facebook app is is not enough, there is another service installed that is not visible as an app (com.facebook.services etc.), which you can only uninstall from the data partition with something like ADB/UAD.
Or buy an iPhone or a Pixel.
The Pixel "Private Space" feature should prevent Meta apps from running in the background. It also prevents you from getting notifications.
I tend to buy stock Android, e.g. Motorola moto g30, etc. It still has lots of Google stuff, but you can get rid of them, and I have a work profile specifically designed for Google-related stuff, and my personal profile is de-Googled as much as possible.
Article did mention Facebook and Instagram at some versions.
Samsung devices are loaded with malware and AI slop in general. I'd avoid them if you at all care about privacy. Since Google is still missing end to end encryption for cloud data, iOS seems like the only good choice currently.
I remember a few years ago analyzing a modern Samsung phone's web traffic. It had by far the most ad-related and monetizing connections out of any other phone I've ever seen. And they were part of "necessary" functions, so you couldn't just block that traffic.
Samsung has great tech, but I avoid because it's so bloated and abusive.