Back in June of 2019, the PCI-SIG announced that work had started on PCIe 6.0 and some two years and four months later,
PCIe 6.0 has reached version 0.9, which equals draft spec. What this means is that companies can now start to implement PCIe 6.0 into their products, to make sure they're compliant with the draft spec, since no additional functional changes will be made, unless something major is discovered.