iPhone 6S successfully MDM bypass on iOS 15.7.4:
"Checking iDevices.....OK
Reading iDevice info.....OK
Activation Status: Activated
BuildVersion: 19H321
CPU Arch: arm64
Device Class: iPhone
Device Name: iMaster’s iPhone
Firmware Version: iBoot-7459.140.15
Device IMEI: 359485087131603
Device MEID: 35948508713160
Product Name: iPhone OS
Product Type: iPhone 6s
IOS Version: 15.7.4
SIM Status: kCTSIMSupportSIMStatusReady
Device Serial Number: FK1W9HZHHFLR
DeviceID: 332fd7471de7f81cb31bceffc1e338362e01b5b7
MEID Status: Supported
Preparing paths.....OK
Waiting for server.....OK
Checking Files.....OK
Bypassing.....OK
Operation {Bypass MDM} ID: F9DCCCC7A4F5365A
Elapsed time 03:14 -- Version 4.4.5 Build 001"