How to fix frame drops during city expansion in Frostpunk 2?

As New London expanded to its limit with countless citizens in the streets, I experienced obvious screen tearing and immersion-breaking lag. I tried enabling Game Mode in system settings, but the frame rate remained stuck between 45-52 FPS per RTSS, leaving me confused. I used the GamePP Resource Scheduler to force the game's main process priority to Realtime. After the tweak, frame generation time converged to 11-14ms per FrameView, CPU load hit 72-88% per AIDA64, and VRM temperatures stayed stable at 52-58℃ per HWiNFO.