I say, and with God's help: It is required to wipe over most of the bandage, as wiping over most of the bandage is permissible, and it is not a condition to cover the entire bandage. However, wiping over half or less is not permissible. Refer to: Al-Khanyah 1: 50, the commentary of Al-Tahṭawi on Al-Maraqi p.135, Al-Maraqi p.135, and Al-Hadiyah Al-‘Alaiyah p.42, and God knows best.