How is there no way to find it? I didn't actively deleted it...
Because there
was nothing to delete. The call gets saved to storage as it's progressing, but only the name and starting point are saved in the directory until you save the complete call. (There's no way to know how long it's going to be or what clusters it's going to end up using until it's done.) So
if you saved it to an SD card, you might be able to recover most of it - if you don't mind waiting a week and tying up a laptop or desktop. See
PhotoRec. But if it was "saved" to internal storage there's not much you can do. (Unless you follow the instructions for recovery from an iPhone at that site, and your phone is already rooted. Rooting it will almost definitely wipe the "recording" before you can recover it.)
Which means that it's not a file, it's in RAM, with parts
maybe stored
temporarily to storage
until you save it.
isn't there an app where i can restore it?
No. Every time you run another app it overwrites what Call Recorder put into RAM. Every time you restart the phone or turn it off, RAM is wiped, There's nothing
there to "recover". (What you
do have, though, is some storage that you can't recover, because it was marked as being used - but since the directory entry was never finished, you can't delete it. And the only ways to recover that space are to do a factory reset or to reflash the ROM. Leave well enough alone and next time, make sure that you save the recording.)
By the way, in the future, when you replace the phone, you won't be able to record calls - that's been removed from Android as of 9.0.