Iphone 11 ic

You might have mentioned that instead of saying that 'you' replaced them...

As degree stated above, they did not 'replace the IC's'. They replaced the entire phone.

And yes, there is a non-zero probability that it could happen again.

Your phone is unsupportable now that it's been tampered with.

If you took it to an Apple Store they replaced the entire iPhone, they did not replace the ICs.