Here’s a profile of him written before his election: https://collegeofcardinalsreport.com/cardinals/robert-francis-prevost/

His twitter handle is @drprevost (feed into xcancel.com or some similar website if you don’t have a twitter account.) There, he mostly retweets things others have said about one or two hot button issues (immigration, ecology), while seeming pointedly disinterested in other issues popular with the same people.

He’s been accused of mishandling sex abuse cases as bishop of Chiclayo, although I will say that I don’t see how a US-born bishop in charge of a Peruvian diocese would ever be in full control of the diocesan bureaucracy: they would never fully accept an outsider as one of their own.

He’s taken the name Leo XIV. The previous Leo was best known for this encyclical.