To get access to IMEI and IMSI, you need to either be a carrier app, allowlisted, or grant the `READ_PRIVILEGED_PHONE_STATE` permission.
Unless Chrome is running at a system level in AOSP or some OEM specific firmware, I wouldn't expect it to have `READ_PRIVILEGED_PHONE_STATE`
[1] - https://grapheneos.org/faq#hardware-identifiers
[2] - https://source.android.com/docs/core/connect/device-identifi...