how many x16 slots do you have empty? this card seems great, just wish it had more reviews: https://www.amazon.com/StarTech-com-Bifurcation-Required-Compatible-QUAD-M2-PCIE-CARD-B/dp/B09Z2ZZ844/

this one costs more, only does 2 ssd, but it's got way more reviews: https://www.amazon.com/StarTech-com-Dual-PCIe-Adapter-Card/dp/B081SJYCTL/