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Could be, especially since the Chu has a non-detachable cable.

Some people were saying the Chu with the mic version definitely had static.

I used my Chu with the Qudelix 5K/etc. and so I had no static, IIRC. It might be different if you are just using it straight to the 3.5mm port/plug of the the computer.

Definitely get a dongle with physical volume control for your computer, it'll fix that issue.

Don't get the microphone version of IEMs, USB-C versions of IEMs or IEMs that have DSP (this uses USB-C), as people report static/hissing/etc. issues with them, more info here: https://www.reddit.com/r/HeadphoneAdvice/comments/11tlco4/should_i_buy_the_salnotes_7hz_type_c_version/jcvuwit/

Try to get any well-reviewed dongle with physical volume control (these are often $30-50+), it'll allow for more volume variation and help reduce/remove any background static/buzzing/hissing/etc. noise.

For the ~$10 Apple dongle, just note the reduced power if it's the EU version, or the apps needed (like UAPP, Neutron, etc.) on Android to bypass Android's DAC/etc. system in order to get the best capabilities.

There's also the ~$10+ Avani, Abigail, Conexant (CX-Pro) CX31993, JCally (various models/units), etc. Some of those cheaper dongles should be available on Amazon.

Click this sentence for more info on dongles with physical volume control (helps with reducing/remove static/buzzing/hissing/etc. noise, especially when gaming).

Click this sentence for about Andy's AudioVault or DongleMadness.

Check the other $20 IEMs like TANGZU Wan'er, Truthear HOLA, 7Hz Salnotes Zero, et cetera, those might not have static if you don't have a dongle. And they have detachable cables, so you can fix that if the stock cable is the source of static/buzzing/hissing/etc.

Is a fixed cable an indicator of sensitivity? What am I missing?

Sometimes stock/original cables are just way too staticky and so if you replace them it will get reduced/removed. Usually using a dongle even with those staticky IEMs will do the job though.

Again better if a dongle with physical volume control as you just click to the lowest volumes with the physical buttons and adjust on the Windows volume slider or phone app/volume slider instead.

It's an unfortunate because I would like to purchase the microphone version to use in Discord calls, but thank you so much for the elaborated answer!

Regular chu (no mic) has no white noise on my galaxy M31.

That's all I can tell you sorry. Hope that helps.