What is the current status of your account? It is indeed common for new accounts not to generate much traffic, furthermore, due to their low trust levels, they are more susceptible to internal restrictions imposed by Google. I recommend that you stick with it for a while longer to see how things develop. If that still doesn't work, you can consider other factors to narrow down the possibilities through elimination.
From my opinion, this doesn’t look like shadow ban, it’s more likely tracking, targeting or account setup issue after currency change messing up signals. Buying rented accounts usually just adds more risk, not real performance improvement in my experience.
No, you are not shadow banned . Google Ads either suspends you completely or keeps you active.