To the Austrian Empire, the greatest significance of the signing of the Vienna Treaty was not to limit France, but to clear the last obstacle for the unification of the Germany Region.
Russia and Spain among others had been bought off, and remaining countries like the Netherlands and Portugal, Nordic Federation, even if they wanted to oppose, had to consider whether they could withstand the retaliation.
With European countries not objecting, overseas nations were even less concerned. In those days, only European powers interfered with overseas affairs; there were no instances of overseas countries meddling in European matters.
Unable to find supporters with shared ideals, the British were helpless. Diplomatic protests were ineffective; they surely couldn't intervene militarily, could they?