What are the In App Purchase subscription durations when testing subscriptions through TestFlight?
The durations are the same as with other sandbox users. Thanks @fsb
The period provided in
apple sandbox duration timings doc
are for reference purpose only and are approximate as told in this WWDC 2018 video engineering subscription .They may or may not be of exact duration as given in the table. So one month in the sandbox may not be always equal to 5 minutes but in and around that.