Whats the difference between using privacy apps and blockers on stock android os and grapheneos

Basically I'm looking at buying a new phone but the new google pixels I find are too expensive. I could buy one but I'd rather avoid it. If I was to buy a cheaper android device and use privacy friendly apps and put blockers on apps to minimize the tracking how effective is this compared to using a privacy focused os? I seen lineageos supports a lot of devices but can you still use google services on some apps because …

android apps os privacy stock