Hmmm,.... retired my B team manager on the Friday.
The B team was due to play on the Sat.
The players were still unavailable, so they had to play all the (terrible) fake but available players on the Sat.
Then the B team had a game on the Wed.
So the new 'game' manager asked what players I (as Barcelona manager) could make available, dropdown menu included an option to make the Barcelona B players available - which I did.
Now their squad is available as normal.
Left them for a couple weeks, they played away in the background as normal quite happily.
Added another B-team manager.
Players unavailable again.
I couldnt find any way of requesting players be made available by Barcelona, so I put the B-team manager on holiday, and the computer sent me (as Barcelona manager) a request to make players available for the B-team - which I did.
Came back from holiday, and theyre still available.
So, Ive maybe been an idiot and missed how to request Barcelona make players available to me as B-team manager.~
Regardless, the solution seems to be to go on holiday and hope the game sorts it out for my return.
Annoying, but sort of resolved.
Cheers