How to remap one of the TinyMCE Advanced Editor button to open the wordpress media library?

I am using the TinyMCE advanced editor for my WordPress site. I want the users in the frontend to be able to upload images using the WordPress media gallery, and for this purpose I would like to remap the Insert/edit image button, or add a new button (whichever is more feasible) to open the WordPress media gallery, so that the Authors can add captions and alt text to their images:

enter image description here

I have been searching on the internet about this, but haven’t found anything fruitful yet.

Can someone help in this regard?