Driving 5 PWM RGBW strips at once?

Questions
1

I have an ESP32 with PWM pins wired to MOSFETs to drive 5 analog RGBW strips. 4 of them work fine, but the 5th won’t save the pin assignments in WLED settings. Presumably this is because the ESP32 only has 16 channels for PWM. So my question is — what is the easiest way around this?

If I were to use a second ESP32 just for the 5th strip, is there a way to hard-wire the first to the second and not depend on a network connection? Is there any other way to drive more than 16 pwm channels with a single ESP32? Anything else I should consider?

2

There are only 16 LEDC channels on ESP32. Each LEDC channel drives one MOSFET.
That is a hardware limitation.