Of course it goes down. Take a look at this chart, expand to 10y or max; inflation was about -0.75% in early 2020. In fact, it went into negative territory many times in the last decade. Prices go down during recessions, particularly.

https://tradingeconomics.com/united-states/inflation-rate-mo...

OTOH, the Fed has goal of maintaining a 2% inflation target; so in the long run you can expect it to go up. For many many years before the pandemic, it failed to achieve that goal. Inflation was too low; which means job growth, wage growth, and gdp was below potential.