I had the same question a few weeks ago! Apparently, the delay between monetary stimulus and the time we'd notice inflation is estimated to be greater than 12 months. I found one of the sources whose abstract I scanned when I had this question[0].

Hedge: I'm not saying it's true or that I've verified any of the research, only saying that economists have studied the effects of central bank stimulus action on inflation rates and the economic response seems to take a while.

[0] https://www.google.com/url?q=https://www.lancaster.ac.uk/sta...