Line a large rimmed roasting pan with foil. Place orange wedges in even layer in prepared pan.
Cut ¼-inch-deep slits in fat of pork, about 1 inch apart.
In a small bowl, stir together oil, sage, thyme, salt, orange zest, and pepper. Rub pork with oil mixture, and place in prepared pan, interlocking ribs. Let stand at room temperature for 1 hour.
Position oven rack in bottom third of oven, and preheat oven to 425°. Wrap bones in foil to prevent excess browning.
Bake until browned, about 45 minutes. Reduce heat to 350°, and bake until an instant-read thermometer inserted in thickest portion of pork registers 145°, about 35 minutes more. Remove pork and orange wedges, and place on platter. Loosely cover with foil, and let stand for 20 minutes before carving. Strain drippings, reserving ½ cup.
In a small saucepan, cook reserved drippings and flour over medium-high heat until bubbly, about 3 minutes. Whisk in broth until smooth. Cook, stirring occasionally, until thickened, about 6 minutes; stir in marmalade. Serve pork with orange sauce. Garnish with sage and thyme, if desired.
Recipe by Louisiana Cookin' at https://louisianacookin.com/herb-orange-double-rack-pork/