Did you wait 24 hours? It sounds like you might be expecting that you JUST activated the 24//7 recording and you think you are going to see what happened yesterday. It will only record going forward from the time you active the PLUS subscription.
Also to make sure you Nest Aware Plus actually got activated go into the Google Home app and click on the GEAR (settings) icon and scroll down to the SUBSCRIPTIONS and select it and then select NEST AWARE and make sure it says NEST AWARE PLUS at the top.
