Brief Answer:
Details below

Detailed Answer:
Hi

Thanks for asking on this platform
I have gone through the details and do understand your concern.
Stool pattern and frequency may vary during first year of life. I won't get overly worried if baby is active, accepting feeds well, passing urine, stool is not very hard and there is no vomiting or abdominal fullness.
I would suggest you better to give home based food instead of cerelac and banana powder. You may give her a variety of food items now as she has completed 7 months.
Give mashed bread in dal or sweetened undiluted milk. Add ghee and vegetables to make it more energy dense and nutritionally better. You may give other cereals. Continue breast feed as per demand.
Mash the food properly before serving to the baby. Also give banana(fresh), cheeku, papaya and other fruits in mashed form as a snacks in between.
Increase the variety and amount gradually and by the end of 9 month give at least one katori serving at a time(3 main serves and two snacks in between with breast feed).
Giving variety of home based food which are comparatively more rich in fibers avoids stool related problems.

I hope this helps.
Please let me know if you have any more questions.
Regards

---