Your phone was manufactured by a front for a foreign intelligence service. It was never secure.
Heck, if you look at where Chinese officials try to stash their money and their families, it's clear they trust Western countries a lot more too.
As an EU citizen, idk, China seems more locally focused, the U.S reaches everywhere. Speaking of NZ, the whole Kim Dotcom situation makes it look like a U.S.vassal state, honestly.
Huawei's products are vulnerable by default, anyone can look up the applicable CVEs and run the proof of concept code for said CVE to pop a shell. China doesn't have exclusive access :)
Remember that Huawei settled out of court to the 'allegation' that they copied Cisco's source code.
So, are Facebook a front for the CIA?