It sounds like this may be a great opportunity for you to practice what it might be like to confront your mother on the same issues. At the end of the day, your therapist is human and will have human responses, but she is a professional who should know how to handle your criticism and should welcome any feedback that furthers your healing process. Maybe you could bring it up as you did here: start of by saying you are uncomfortable to bring this up (I always find it to be empowering to be honest that I'm coming from a vulnerable place), and just gently let her know that you've been feeling like you're recognizing a similar dynamic and you'd like to talk about the similarities and what they are bringing up for you.

Wishing you luck and healing. <3