The Rama writes that the minhag is that nowadays Ashkenazim women do not lean at the Seder. Does that mean it is forbidden for an Ashkenaz women to lean? Is she permitted to lean if she wants to? Are there any poskim that permit an Ashkenaz lady to lean?
What the Rema means, is that they are not careful to specifically lean, and that they don’t have to lean, however if they want to they may. The wife of the Chasam Sofer, (the daughter of R’ Akiva Eiger,) used to lean, and the Chasam Sofer was careful she should have a place to lean.
Kaf Hachayim O:CH 472- 28, Michtav Sofer Drashos on the Haggadah of Pesach D:H Kadosh, Pischei Teshuvos 472-2.