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

The PCI Express x1 to x16 adapter accommodates low profile x2, x4, x8, x12 or x16 PCI Express cards, eliminating the cost and hassle of upgrading a PCIe card or

In ASUS 「PCIe x16 Slots - 2」

x16pciexp slot In ASUS 「PCIe x16 Slots - 2」

olympus demo slot zeus 1000 A PCIe x16 slot provides powerful graphics card support if the The motherboard offers three slots, one of which is a PCIe x4 slot