Soooooooo, I just got hit by "The childhood nostalgic memories train" and I remember like snippets of a certain children's movie or drama(??), I don't remember but what I do remember is.... (1) It was animated.... I think. (2) It was about like a child and she gets kidnapped or adopted but is I think locked with other children in like a basement or cellar. (3) I remember the children being abused a liitle bit and I don't know why but I keep remembering words like cotton (perhaps related to the sewing)... (4) The lady there forces the children to make clothes for her. (5) And like I think in the end they(children) all like get together. (6) And well, I think they escape with help of sewing tools (?) and a key made of food( I DONT FREAKIN REMEMBER MANNN)?
its a shot in the dark, but maybe its coraline? its animated, there were children who were abducted and mc needed to escape the house, the movie's antagonist uses sewing as their theme, wanting to sew buttons as the children's eyes
it strangely sounds a lot like the book Boys Without Names. I think it has a movie too, but I highly doubt it's what you're looking for