Good that you found something you can actually stomach, pill aversion during pregnancy is so real! Olly gummies cover the basics like folic acid and DHA which is helpful, and Anmum Materna is quite well-regarded here for the additional nutrients and calcium, so combining both is something a few mums I know have done, though the overlap in certain vitamins is worth watching since you don't want to over-supplement on things like Vitamin A. My friend actually brought this exact combo up with her gynae and was told to check the total iron levels especially, since gummies generally have lower iron than standard prenatal tablets, which could be a gap at 21 weeks. So the combination sounds reasonable on the surface, but honestly the nutrient amounts vary quite a bit between brands, so it's really worth running it by your own doctor or gynae to make sure your specific needs are covered properly.