"We have been doing a lot of tasks manually, but with the new software, these processes will turn into anunmannedoperation / will turn into unmanned operations."
("the unmanned operation(s)" is not right here.)
The sentence is OK, but I think I'd prefer "... these processes will become automated."
I suggest u to use ' an un-manned operation' as the subject 'these processes' will be considered as singular in this sentence. But I suggest u to go through the following sentence too.
"......................................................,these processes are automated"