New hard drives not found when installing window 11. Tried everything!

Because both drives appear in BIOS but neither appears in Windows Setup, the likely problem is the storage-controller mode or its preinstallation driver, not either disk. From Acer, download the Intel Rapid Storage Technology driver for the PO3-650 and extract it completely to another USB drive. In Setup, choose Load driver and browse to the folder containing the matching x64 .inf file, not SetupRST.exe. If no compatible driver appears, do not force another package; confirm the hardware ID and BIOS storage mode with Acer. Disabling VMD without changing the controller consistently can cause a driver mismatch. Restore BIOS defaults, update BIOS if Acer recommends it, then use either Acer’s documented VMD/RST configuration with its driver or AHCI mode, if supported. Disconnect the second disk during installation. If Setup still detects neither drive, contact Acer because Microsoft installation media cannot supply an OEM-specific controller driver that Acer has not packaged correctly.