PCIEx16 drops to x 8 when M2 SSD is installed???

PCIEx16 drops to x 8 when M2 SSD is installed??? m 2 4 0 in 3 0 slot I believe both slots are generation 3 because chapter 1 of the manual indicates that HP only offered Gen 3 NVMe SSD's in the model series and m2 pcie 40 in 30 slot 2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

m2 pcie 40 in 30 slot 4 for the PCIe slot you wish to install the HYPER X16 HYPER GEN 4 CARD supports both PCI Express and PCI Express

m2 sata vs nvme slot 2 NVMe solid-state drives, for a total of 32TB, into a single PCIe x16 slot without needing additional drivers High-Speed Storage The PCIe x16 host 2 PCIE adapter ONLY supports PCI-E NVME based M Key , NOT supports any SATA based SSD Fit for PCIE x1x4 x8 x16 slot No driver