Question about Spanish league reserve team

So now some of the reserve team in spain is no longer b team but rather a affiliate team, can these affiliate teams actually play in top league??

e.g valencia mestalla

It´s still the b team and the original Spanish rules did not change. It's just handled as an affiliate in the game for other reasons. I guess own manager and staff.

but the fact is u can actually add manager to control valencia "B" team(valencia mestalla), so whts the point of being the manager of a team that cannot win a trophy?

is there anyone who can answer me plz~~~

You can win a trophy, you can win the lower division championships and the cup. So ure pointis innacurate in that respect. Some ppl may fancy the challenge of leading the B or C team of a top team as it may help them achieve the TOP job. I dont know if SI went as far as to implement this aspect but it's an option if not for now then for future versions.

In game, I'm not sure, but in real life, a B team cannot be in the same division as the A team, or above it. If it's in a place to be promoted to the division the A team is in, the team below will be promoted instead. And if the A team is relegated into the same division as the B team, the B team will be relegated below even if it won the league.