This crisis shows that the UN is either incapable or unwilling to protect basic rights as it has failed to halt violence for almost two years now. Indeed, Beijing and Moscow have blocked some efforts but the UN itself — which is quick to observe atrocities but slow to actually take action — is to blame. While the IIMM may promote future accountability, it won't bring immediate relief to the people currently suffering.
The purpose of the IIMM is to serve as a UN evidence-gathering body to ensure that the most serious international crimes in Myanmar reach the ICC, and that's exactly what it's doing. Although it may not be a perfect mechanism, it has gone a long way in collecting huge amounts of evidence that will hold those responsible for the atrocities being committed in Myanmar accountable — despite limited resources due to the war in Ukraine.