英语表达：然而，暂时我们并不了解他们的进展情况和时间表。

However, we don't know how they are getting on, as well as their schedule temporarily.

Whereas,we are not clear about their development of the project and the schedule for the time.

however，we haven't known their progress and schedule for the time being.

However, we know little about their progress and timetable for the moment.