You’re a mum for selling out the best help she can get at an early age! I wish my parents did the same for me! My only suggestion is to keep encouraging her to practice and use the techniques every single day so it rewires her brain into using new speech patterns. Otherwise, it will relapse back. Start getting her to read aloud every single day using the techniques she’s learnt. If you’re out at the shops, get her to order her meal. Get her desensitised to speaking to strangers in different settings. Everything will help. Good luck! 🙏🏼