Just for reference:
https://books.google.com/ngrams/graph?content=things+didn’t+work+out%2Cit+didn’t+pan+out&year_start=1800&year_end=2000&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Cthings%20did%20not%20work%20out%3B%2Cc0%3B.t1%3B%2Cit%20did%20not%20pan%20out%3B%2Cc0

is it can be used instead of " не получилось " interchangeably?

Yes, the meaning is practically the same. But “не сложилось”, implies that something went wrong, something spontaneous prevented us from reaching the goal while we did what was required.
“Не получилось” can also mean that we couldn’t, were not able to do it.

thank you very much Alex. .l appreciate it..by the way your English is very good ))

🤝