No, FFF's 'Get Story URLs from Web Page' feature only works on one page at a time.
As a rule, I strongly recommend
against downloading hundreds of stories at a time.
Doing so causes a lot of traffic to the site, which has been known to get you blocked from many sites. It also is a contributing factor to more and more sites using blocking technologies to prevent automated download entirely. (Probably--we don't know that for certain.)
Doing batches of only a few 10s of stories at a time over a number of days is more recommended.
If you insist doing it anyway, you should set a higher
slow_down_sleep_time value than the [wattpad.com] default of 2 seconds.
Here's a couple times it's come up in past:
https://www.mobileread.com/forums/sh...ss#post4137143
https://www.mobileread.com/forums/sh...ss#post3830540