Frame Generation not work in game on UE5.3

When using the DLSS plugin, when I normally package an empty level game, the Frame Generation can be turned on normally. However, when packaging the official project, turning Frame Generation on or off has no effect. My official project has an operation of embedding the original game viewport into another form (the performance effect is similar to the editor). Will this cause Frame Generation to fail to take effect? Except for Frame Generation, other functions are normal.