Servo/Linear Actuator Code troubleshooting

Isn't that the point of this line?

//use the writeMicroseconds to set the linear actuators to their default positions
  LINEARACTUATOR.writeMicroseconds(linearValue); 

I'm not sure I understand your statement.

See below the linear actuator code that does work by itself. I merely copied it into the servo code that also worked by itself.

//Includes
#include <Servo.h> //Servo Library
#include <Bounce2.h> //Debouncing Library

//Defines
const int LINEAR_ACTUATOR_PIN = 5;        //Linear Actuator Digital Pin
const int BUTTON_PIN = 4;     // the number of the pushbutton pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

Servo LINEARACTUATOR;  // create servo objects to control the linear actuator

int linearValue = 1000;   // current positional value being sent to the linear actuator. 

Bounce debouncer = Bounce(); // debouncing object


void setup() 
{ 
  //initialize servo/linear actuator objects
  LINEARACTUATOR.attach(LINEAR_ACTUATOR_PIN, 1000, 1500);      // attaches/activates the linear actuator as a servo object 

  // initialize the pushbutton pin as an input with internal pullup:
  pinMode(BUTTON_PIN, INPUT_PULLUP);     

  // After setting up the button, setup the Bounce instance:
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(5); // interval in ms
  
  //use the writeMicroseconds to set the linear actuators to their default positions
  LINEARACTUATOR.writeMicroseconds(linearValue); 

} 

void loop() 
{ 
    // Update the Bounce instance :
  debouncer.update();

  // Get the updated value :
  int buttonValue = debouncer.read();

  if ( debouncer.fell() ) // if the button was pressed
  {    
    if (linearValue == 1000) //if the box is set to close
    {
      linearValue = 1500; //set box to open
    }
    else if (linearValue == 1500) //if the box was set to open
    {
      linearValue = 1000; //set box to close
    }
  } 
  
  LINEARACTUATOR.writeMicroseconds(linearValue); //use the writeMicroseconds to set the actuator to the new position
} 
}