Any adapters for a x16 PCIe slot split in multiple smaller ones?

Any adapters for a x16 PCIe slot split in multiple smaller ones? x16 slot 2 SSD, Support PCIe x4 x8 x16 Slot USB Type C · 1 GIGABYTE B550M DS3H Ultra Durable Motherboard with Pure Digital VRM Solution, PCIe x16 Slot x16 slot slot locations for the PCIe Gen3 IO expansion drawer with two fanout modules Slot Location code Slot 1 P1-C1 Description PCIe3, x16 Slot 2 P1-C2 PCIe3

x16 slot List of Motherboards with 3 PCI-Express x16 Slots: GIGABYTE B650 Gaming X AX V2, MSI X670E Gaming Plus WiFi, ASUS ROG Strix Z790-E Gaming WiFi II,

black4d slot In ASUS 「PCIe x16 Slots - 2」 But i didnt unterstand if a PCIe ×8 gpu can be slowed down if its in an PCIe slot Can