We currently only gather bad block metrics after processing at https://github.com/NethermindEth/nethermind/blob/master/src/Nethermind/Nethermind.Consensus/Processing/BlockchainProcessor.cs#L457.

However, it's important to note that bad blocks can occur at other stages as well. For example:

1. During hash validation in NewPayloadHandler: https://github.com/NethermindEth/nethermind/blob/master/src/Nethermind/Nethermind.Merge.Plugin/Handlers/NewPayloadHandler.cs#L101
2. During orphaned block header validation: https://github.com/NethermindEth/nethermind/blob/master/src/Nethermind/Nethermind.Merge.Plugin/Handlers/NewPayloadHandler.cs#L131
3. During block validation in NewPayloadHandler: https://github.com/NethermindEth/nethermind/blob/master/src/Nethermind/Nethermind.Merge.Plugin/Handlers/NewPayloadHandler.cs#L159

The same limitation applies to the debug_getBadBlocks function; it only captures bad blocks that occur during processing. It might be beneficial to check how other clients handle this issue