The Walking Dead S1 to S9 plus first half of season 10A left the NowTV service early part of March 2020.
I have no idea when it will be back (unless somebody from NowTV can provide a return date ?)
I believe Amazon have Season 1 to 8 on Prime, where last time i checked Season 9 and 10 was offered has buy or rent option.
My understanding it left early part of March 2020 for Seasons 1 to 9 (plus first half of Season 10).
Here's a screen shot that i took back towards the end of February showing how many days remaining which covered S1 to S9 plus S10 first half on their service (wasn't aware it's been back since 😡 though i might have been wrong).
I had a look over on Twitter and this is the latest Tweet i can find from NowTV regarding The Walking Dead back in March where they didn't have a return date (see screen shot below).
So i am a bit confused you have been watching this TV series (apart from S10 part two) during April.
Unless this TV show sneaked back on the NowTV service which i missed.
I will tag @Jason-C of the NowTV Team to see if he can clarify and maybe assist you further.
Thanks for getting in touch.
Our schedule says The Walking Dead (S1-9 and the first part of S10) expired in March.
If the episodes were available for longer than this, then this was likely a mistake.
The latter half of S10 expires in May. Unfortunately we have no date yet for its return.