Vatican citizenship is based on having a job inside the Vatican, or at an apostolic nuncio (ie, embassy), or very rarely, being married to someone with such a j

Vatican citizenship is based on having a job inside the Vatican, or at an apostolic nuncio (ie, embassy), or very rarely, being married to someone with such a job. Quitting the job means loss of citizenship. So it is no surprise nobody applies for work based visas with a Vatican passport.