UE5 C++ Compile Time is Substantially Longer

[Camps]

I’m not sure if this will help you since my project is small, but it definetly helped me (went from 3 minutes compiling time to 3 seconds in my first project (just started learning)):

Go to:
C:\Users\YOUUSERNAME\AppData\Roaming\Unreal Engine\UnrealBuildTool.xml

edit it with the following code:

@Emrehan

<Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
    <ProjectFileGenerator>
        <Format>VisualStudio2019</Format>
    </ProjectFileGenerator>
        <BuildConfiguration>
            <MaxParallelActions>12</MaxParallelActions>
        </BuildConfiguration>
</Configuration>

I found that in this threat:
Compilation taking twice as long in UE5: Number of processes being limited? - Programming & Scripting / C++ - Unreal Engine Forums