DLSS 4.5 and Unreal 5.7.4, Frame Generation don't work

I compiled the DLSS4 Sample and tested the build, but Frame Generation doesn’t seem to kick in on my 4090 (See the screenshot)

Can you be a bit more specific? the screenshot does not show whether FG works or not.

It is enabled though and if you run PIE or as standalone app you will see the difference when you toggle it on and off.

Maybe that helps?