I think its messed up that Conte is doing this to these players, not even letting them participate in first team training. These aren't guys with huge disciplinary issues (except maybe N'Dombele) and Reguilon and Winks were actually important players for him last year. Not even Barcelona is doing this with their unwanted players as far as I can tell.
I don't see any issue with this at all. And this has nothing to do with Barcelona or their ridiculous stances.
All 4 of them are very clearly not in Conte's plans and they've been told to find other clubs. Lo Celso is well en route for that but unfortunately most clubs in the rest of Europe are skint. Nobody wants N'dombele, especially on his ridiculous wages and he has to go down as probably the worst signing in our history, the lazy bastard. Reguilon is a difficult one because he's a good player but again there's a lack of money on the mainland and he apparently is not that interested in going to clubs like Brighton. Winks is seemingly turning down a few clubs lower down the league hoping for a better offer.
None of them will get a squad number or place next season if they stay and frankly none of them should. Its up to them now to try to find moves.
They're getting paid and they're still allowed to train on club grounds, which is what they're contracted as being able to do. They have no future at the club though.