Are you interested in moving to full stack at your current job? Nothing has changed for you in these couple of months?

If you don't want to go into full stack at your current job, it may be related to personal preferences or the specifics of the project. In a couple of months, much may not change if there haven't been new tasks or opportunities for development in this area. It's important to assess what exactly doesn't attract you about full stack — perhaps it's worth discussing with management the possibilities for growth or role changes, or focusing on deepening your frontend skills.