I have a polygon geometry and I have some points that are its vertices. QGIS changes randomly the position of labels. When I choose 'outside of symbol' option, labels are showed outside of point symbol, but not outside of polygon.

I am doing many maps and I need labels to be showed like this.

How could I show labels of these points changing its position to be outside of the polygon automatically? Is there any rule based solution or anything else?

Thank you so much!