We had a big increase in the money supply after the financial crisis, and yet inflation remains stubbornly low. At some point one needs to recognize that there is more in heaven and earth, Horatio, than dreamt of in your philosophy.
If you acknowledge that there was a big increase in money supply, then there is nothing more needed to conclude that there IS inflation. Whether acknowledged by official narratives or hidden, does not matter: it is still there and cannot remain hidden forever.
But can you explain why practically all Central Banks are recently worried about high asset prices? Are high asset prices the sign of a stubbornly low inflation, in your opinion?