is baby sofa really helpful for baby to teach them seating ?

A. Mam every single day there are new things coming to make your child have different kind of things like sitting standing this that the other but actually first of all you should know this a child should be meant to make it after completing the time of six months and instead of using a sofa even if you put your child on the bed with support of five or six pillows it helps in previous times parents used to make it like this only and the child used to learn to sit so it is your comfort if you want to buy a sofa but otherwise actually genuinely it’s not required