NVIDIA/Mellanox T-DQ8FNS-N00-M Compatible 400GBASE-SR8 QSFP-DD PAM4 850nm 100m DOM MPO-16/APC MMF Ethernet Optical Transceiver Module, Breakout to 2 x 200G-SR4 and 8 x 50G-SR
Yes, I bought the whole products for 400G-200G solutions from FS recently. They work well in our data center so far. You can check the connectivity solutions on the #165879 custom MTP-16 to 2x8 fiber MTP cable.