Of course, but those aren't trustless per my question. They're designed for single administrative environments like corporate data centers where a trusted entity controls the environment.

The other two possible environments being multi-administrative (permissioned DLT deployed among a consortium of banks or entities sharing administrative privileges) or no-administrative (public permissionless blockchains like Bitcoin/Ethereum). The hard problem is developing consensus algos for the latter that scale while maintaining security of the shared ledger.