Multiple rounds to commit a block

Hi all,

Since “there may be more than one round required to commit a block at a given height” I wonder what are the appearance and other statistics of such blocks in Cosmos blockchain?

I know that in Mintscan you can see number of rounds for any block and I guess it may not be accurate as even a block that took more than 12 seconds (double standard time) to commit was created within one round which I believe cannot be true.

Any data sources that can reflect this scenario are more than welcome.