Hung juries really aren't that common here - asking for majority verdicts normally shakes down the wheat from the chaff - and I follow around 150+ murder trials a year, probably a lot more
They ARE common in the USA because now all states, since January 2023, require unanimous verdicts in cases involving serious crimes - majority verdicts were allowed before but only in Louisiana and Oregon. So, if a jury can't agree, it results in a mistrial and then the DA needs to decide whether to prosecute again.