At present the /tables/{tableNameWithType}/livebrokers API doesn't support table names without the type suffix. Upstream callers that are not aware of the available types for a given table will have to try the API for both the table-types to determine the available brokers.
We can either update the existing API to handle tables names without type or add a new API. Updating the existing API would inevitably change the behavior of the API so it can cause compatibility issues.
This was also discussed in the PR for adding the livebrokers API as a follow-up: e2e3aeb#r738959901