ontriggerenter and setting bool to true

i have a jetpack script which i want to work the following way: you pick up the jetpack from the ground and then when its on your back you're able to fly with it.. And that sort of works, but only if i hold down the fly key as i enter the jetpack object, if i pick it up and try to press the fly key after, it doesnt work :/ i can set the bool to true in the inspector, after i picked up the object and im able to fly fine. Also i cant fly that way before ive picked up the jetpack, so it works 80% of the way.. i have a suspicion that i might have to use a coroutine, or put something in update, idk

my code is as follows:

 public class JetPack : MonoBehaviour {
 
     public bool renderEnabled = false;
 
 
     void Awake()
     {
         GameObject.FindGameObjectWithTag ("JetPack").renderer.enabled = false;
     }
 
 
     void OnTriggerEnter2D(Collider2D other)
     {
         if (other.gameObject.tag == "Player") 
         {
             enableRender();
             Destroy (gameObject);
         }
     }
 
     public void enableRender()
     {
         renderEnabled = true;
         GameObject.FindGameObjectWithTag("JetPack").renderer.enabled = true;
 
     }
 }

and in the player class:

 if(jetPack.renderEnabled == true)
         {
             if(controller.moving.y > 0)
             {
                 if(absVelY < MaxVelocity.y)
                 {
                     forceY = jetSpeed * controller.moving.y;
                 }
             }
         }

 void OnTriggerEnter2D(Collider2D other)
     {
         if(other.gameObject.tag == "jetpackitem")
         {
             jetPack.renderEnabled = true;
         }
     }