Build a latching switch circuit A that can also momentarily close switch B?

Hi - I am a hack at this stuff and could use some help

I am building a device that integrates a commercially available PWM frequency and duty cycle generator mini-board (e.g., one of these:





https://www.amazon.com/Eachbid-1Hz-150Khz-Frequency-Adjustable-Generator/dp/B07CG9VYDN ).

The above PWM generator...

Build a latching switch circuit A that can also momentarily close switch B?