The current check if (totalTimeUnrivaled < confirmationThresholdBlock) only reverts when totalTimeUnrivaled is strictly less than confirmationThresholdBlock. This means that if totalTimeUnrivaled is exactly equal to confirmationThresholdBlock, the condition is not met, and the code proceeds without reverting.
However, in the context of confirming assertions, this can be problematic. If the totalTimeUnrivaled is exactly equal to confirmationThresholdBlock, it implies that the confirmationThresholdBlock has not been fully passed yet. To ensure that the assertion is confirmed only after the required confirmation blocks have fully passed, the check should also include the case where totalTimeUnrivaled is equal to confirmationThresholdBlock.
https://github.com/code-423n4/2024-05-arbitrum-foundation/blob/6f861c85b281a29f04daacfe17a2099d7dad5f8f/src/challengeV2/libraries/EdgeChallengeManagerLib.sol#L741-L743
