MXM to PCI-e x16 extension

I am currently just browsing laptops as a possible buy but I've noticed a disturbing trend of laptop GPUs not being available in MXM form

Konverter MXM zu NVMe Key M Slot · Connectors: 1 x MXM male · Form factor: MXM 3 type-A · Interface: PCIe Rev · Supports M · Maximum height of the

dragon 121 slot Why do laptop GPUs use MXM over a standard PCIe 16x slot?, I know it's a bit of a thicker connector, but the heatsink on the GPU will still

sgo777 slot Cincoze's rugged “GM-1000” embedded PC combines an 8th or 9th Gen Coffee Lake CPU with an MXM socket plus 2x SATA trays, triple display