Divide dough into two equal portions (about 28-30 ounces each). Round each portion to an oval shaped piece of dough by pulling the dough and tucking it underneath itself. This will make it easier to roll out into a rectangle.
Flour the work surface and roll dough out to a rectangle, about 10 x 18-inches. Spread half of the Biscoff Filling on the dough, leaving a 1-inch border on the top edge of the rectangle. Leaving this border will help in sealing the dough shut when rolled up.
Start with the long side closest to you, and working from left to right, begin to roll up the dough. Tug and pull as you go, which will tighten the roll and make more swirls. Once it's all rolled up, pinch the seam shut by pinching the edge of the dough to the roll.
Cut 9, 2-inch cinnamon rolls (I find using dental floss makes the cleanest cuts!).
Place the Biscoff cinnamon rolls on a 13 x 18-inch baking sheet, sprayed with nonstick spray. Space the rolls about 2 inches apart. Roll out, fill, and shape the second piece of dough. You should be able to fit all 18 cinnamon rolls on one half size sheet pan.
Cover and let rise until puffy (see notes for Poke Test), about 45-60 minutes. Towards the end of the rise time, preheat oven to 350°F/177°C. Just before baking, pour the room temperature heavy cream over the tops of the rolls.120 g heavy cream