@Moline You will still need to setup a bootloader which can add SSDTs and apply _OSI → XOSI patch such as OpenCore or Clover. I don’t recommend replacing the whole DSDT using testsigning because it can cause issues.
Only the second part of the guide “Enabling trackpad” has to be done Fixing Trackpads: Manual | Getting Started With ACPI
In SSDT-XOSI.dsl change If (_OSI ("Darwin")) to If (_OSI ("Windows 2009")), this will trick DSDT into believing it’s running on Windows 11 (or whatever the newest version DSDT uses) enabling trackpad and any other features that were disabled for Windows 7.