I like the Bubs Maternity Pillow, been helpful to keep me off my back and support my bump while sleeping https://www.babybub.com/products/pillow
I got the huge u shape one last pregnancy but didn't get on with it couldn't get comfy on it and took over bed. I ended up using a combination of a normal v shaped pillow with the long side angled so pillow was against back so didn't roll onto back and a jml knee pillow to keep me on side found much better and am using again this pregnancy. Also much easier to take the knee pillow on baby moon just fitted in rucksack!
I love this one! https://amzn.eu/d/aqymeFr