Real Madrid team B participated in the Spanish second division. Is it possible to upgrade?

Of course not. There are rules. If Real Madrid team B can enter the promotion area of the second division, it will be the other two teams in the promotion area, ranking fourth in the second division. In fact, last season, Team Malaga B also played in the West B, but it was a pity that it was relegated at the end of the season, just as Team Malaga I was also relegated from the First Division, so now Team Malaga I is in the West B (imagine, if Team I and Team B appear in a league at the same time, the result of the two teams' game can be decided by the team, which is obviously impossible. In addition, players from Team B and Team I can be exchanged at any time, regardless of the transfer window, such as last season.