Yes. The insertion of an IUD always comes with bleeding immediately afterwards, but the copper IUD is a) bigger than the Mirena and other options, so it takes more of a physical toll, and b) doesn’t have hormones, so it doesn’t reduce length/volume of periods the way every hormonal birth control option does. On top of that, the first six months to a year on the copper IUD is associated with even heavier periods than a person will have experienced prior to starting birth control. It does eventually stabilize after that first six months or so, but it’s still more than you’d experience with a hormonal option. People on Mirena (the hormonal IUD) sometimes cease having periods altogether, so it’s a pretty sharp contrast.
I’ll definitely post about my own experiences with this, at least for my first six months with the copper IUD, maybe longer.