PCIe expander works without problems with my 1070 and 1080ti, so...
At least this one: https://www.aliexpress.com/item/PCI-E-to-PCI-E-Adapter-1-Turn-4-PCI-Express-Slot-1x-to-16x-USB/32833259844.html?spm=a2g0s.9042311.0.0.I4NdDS