"Since 2020" is not a great metric, since a lot happened in 2020.
Here is a chart that shows the number of bank failures over the past decade [0]. As you can see, having a year with 0 failures is actually the outlier. The average annual bank failure over the past 20 years is roughly 20 per year and the median number is 8 per year.
Note that FDIC has a precise meaning for a "bank failure" - many more "failures" occur but FDIC gets there early enough and arranges for another bank to "take over" - more or less quietly. These are usually tiny community banks.
Here is a chart that shows the number of bank failures over the past decade [0]. As you can see, having a year with 0 failures is actually the outlier. The average annual bank failure over the past 20 years is roughly 20 per year and the median number is 8 per year.
[0] https://www.fdic.gov/bank/historical/bank/