Get my B team in a league?

I’m Poblense and two seasons ago I asked for a B team and got it accepted but they don’t play any games? They have no fixtures at all and I see that other teams in Spain have B teams in other leagues apart from La Liga, is there anyway I can ask for my B team to be in a league? Or does my team need to be a certain level for that to be available? Hope you guys can help!

Fizzy.