No, "reached a decision" is perfectly acceptable. "Reached a feedback" isn't.
"I would be pleased to know if you have yet reached a feedback regarding my interview to be shared with me."
I am going to send this to HR after conducting an interview with me.
I come up with this sentence from the below sentence:
I would be pleased to know if you have yet reached a decision regarding my application.
No, "reached a decision" is perfectly acceptable. "Reached a feedback" isn't.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
How about "Do you have any feedback from my interview to share with me?"
Note that "feedback" is uncountable.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.