Bypass the requirements for extreme graphics settings

My PC has Intel Iris Plus with 128mb dedicated video memory and 8gb total available graphics memory. The game only checks dedicated memory thus I cannot select Ultra textures. Because I have enough dynamically available memory, so there is no problem even on High settings, and there wouldn’t be on Ultra.
I searched various forums, no solution worked to simulate pre-allocated memory. The game should just use all available sharable memory, not just dedicated.
Please help, I really need to play with Ultra textures. Maybe there is a way to force graphical settings? Or anything?