If you prefer not to use third-party APKs, most Android phones have built-in ways to manage CPU behavior:
You don’t necessarily need a specific APK to change CPU behavior. You can use a PC to send commands to your phone to change its "Power Mode."
"It’s important to manage expectations with any 'no root' CPU tool. Because Android restricts system-level frequency controls to the root user, apps like this often use scripts or 'hints' to the system governor rather than direct control. On some newer devices (Android 10+), I found it either had no effect or caused the app to crash entirely. If you really need to squeeze more power out of an old device, rooting is still the only way to get the full SetCPU experience." How To Use SetCPU For Android