Regardless of how you do it, you will likely hit PCIe bottlenecks that negate any benefit, whilst still granting all of the CPU/Latency/Integrity downsides of RAID0. At best, it's an impractical, expensive, complicated way to break even, and at worst, it's a lose-lose scenario that's slower, problematic, inconsistent, less secure, and slows down your CPU in the process.
Are you on PCIe 3.0 or 4.0? The only instances where it makes any sense whatsoever to RAID0 NVMe drives is on Epyc/Threadripper platforms where multiple PCIe SSDs can guarantee their own bandwidth rather than using shared lanes, or on a Rocket Lake PCIe 4.0 board if you bought PCIe 3.0 SSDs by mistake. In the Rocket Lake scenario, the better option (by far) is to return the PCIe 3.0 SSDs for a refund and just buy a PCIe 4.0 SSD instead; You cannot get any benefit on Rocket Lake beyond one PCIe 4.0 SSD.
RAID0 - AKA striping - really is a mechanical disk technology. Don't use it for SSDs unless you really have no alternatives.
