Answered by Shaykh Yusuf Weltch
Question
Is my fast invalid because I don’t pray?
Answer
In the Name of Allah, the Most Merciful and Compassionate
Missing prayers during a fast do not affect the validity of the fast. The two are seen as separate issues that do not affect one another.
Hope this helps
Allah knows best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani