It’s Wikipedia, so not the greatest source in the world, but there’s lots of interesting info. Apparently he was strongly involved in fighting corruption in Honduras, and some of his claims of corruption were later corroborated by evidence. Also, he ran for president in 2017 and lost, and like Trump he claimed the election was stolen, but unlike Trump there was actual evidence and the election fraud was quite prevalent according to NYC prosecutors.
Translation of the headline into English per Google: “Sinaloa cartel bribes and electoral fraud with drug money: 15 facts from the summary of the Prosecutor’s Office in the JOH case.”
While France 24 above claimed he is right-wing, I don’t know that he would be called such in the US; he is running as a member of the Liberal Party of Honduras, which is centrist. It does, however, believe that abortion should be illegal, if that tells you anything. The guy that Trump is backing is with the National Party of Honduras, which is explicitly Christian and has been involved heavily in election fraud, drug trafficking, and money laundering. Based on my brief research, Nasralla seems preferable to his rival.