All repeating tasks, whether they are set to repeat on a specific schedule or whether they are set to repeat after completion, show the frequency of their repetition with the following text after the repeat symbol:
"Every x time"
There is nothing to show whether a specific task is set to repeat after completion or not, so in order to check, it's necessary to open the repeat options for the task. My suggestion is that when a task is set to repeat after completion, that text should instead say:
"After x time"
...which would provide a clear, at-a-glance indicator of the type of repeat as well as the frequency.