Lost all tracks

Hi,
English is not my mother language, i’ll do my best.
One of my tracks never end and was 455h long. The app bugs and quit before i had time to delete this track. So i delete the app from my iphone and reinstall it but i lost everything in and i can’t find any saving in icloud.

An idea to help me?

thank you all.

Does anyone have an idea to get back my tracs?
Or si it just impossible.