Honestly I don't know enough to answer that question fully.
From what I understand PCI addresses (01:00.0) are dynamically assigned by the motherboard's BIOS at boot. Adding or removing PCIe devices, enabling M.2 drives, or adjusting BIOS settings often shifts your device addresses up or down which can prevent a VM from starting up.
Reading online though, there now seems to be a workaround to this issue. I might need to give it a shot on my Proxmox machine.
"PCI ID overrides" is the term in this document to search for.
Everytime I am sitting in a meeting and management starts talking about AI, I find my self thinking we never got these presentations for windows Notepad (or any other software for that matter).