Can I add 2 nwme ssd Storage Memory in my Acer Nitro AN515-45

SSDs support both NVMe protocol using PCIe interface and AHCI using SATA offers connectorized modules supporting NVMe and SATA

First of all, I know that a PCIe 4 SSD NVMe will be running at gen 3 speeds and bottlenecked by the PCIe 3 slot But I'm wondering if there are

2x m2 ssd slot nvme pcie gen4 ONLY work with NVME or PCIe based drives and not the older SATA based SSD

2xbet slot 2 drive on a PCIe expansion card, enabling the use of an through the PCIe slots 2 is a form factor that can take the form of a SATA SSD or a PCIe NVMe