One has to wonder though. Apple refused to provide the FBI a backdoor, which people speculated would be due to setting a precedent for Apple to make these backdoors standard

How likely is it that everything Apple sells in China is backdoored as mandated by the CCP?

Very likely:

https://support.apple.com/en-us/HT208351

They allow a Chinese company to manage iCloud data.

It's clearly 100%.

What about the infamous browser attack publicized by Google’s project zero that seemed to be perpetrated by the Chinese government in order to target the Uighur Muslims? If true that would seem to imply the CCP did not in fact have backdoors already right?

It was targeting the Diaspora, which was using non-China models.

Ah, interesting, "Diaspora" meaning Uighurs outside of China? In that case though, what evidence is there that it was geographically targeted? My understanding was that the attack apparently focused on websites likely to be visited by Uighurs, so how would we know what the geographical target was?

The targeted websites are blocked in China. They are only accessible outside of China.

Thanks for clarifying, I didn’t realize that!

The FBI doesn't have the ability to prevent Apple from selling phones in the USA. There is no law I know of that would allow the FBI to do that. China does have the ability to prevent Apple from selling phones in China.

The FBI doesn't have the direct ability, but they do have the ear of multiple powerful people who can move policy & trade law around to apple's disadvantage. They did just lose multiple requested tariff exemptions in the trade war.

Are you suggesting a Federal law enforcement organization, that maintains files on certain private individuals, would collectively come together to approach politicians to do blacklist a company?

Because that would be illegal on about 97 levels. Right out of the gate it would be seen as potential blackmail.