https://github.com/opa334/TrollStore/blob/main/README.md
> It works because of an AMFI/CoreTrust bug where iOS does not correctly verify code signatures of binaries in which there are multiple signers.
> Supported versions: 14.0 beta 2 - 16.6.1, 16.7 RC (20H18), 17.0
This seemed to happen because they didn't have time to release 17 with the bug fixed, which is why 16.7 Final is not supported; per https://x.com/MasterMike88/status/1743974453459956209