How are you? Thank you for writing on this platform and expressing your concerns.
It is very unusual that partners do not fight for so long, but having said that, what matters more here is that you still feel the same in your relationship as you did before. If there is still love and understanding between you both, then it is completely fine.
It could also be so that the fight between you do not happen if you have a very good understanding between you both. Clear communication and understanding can really be helpful that way.
I would suggest that of you really are concerned about it, then it would be good to talk to your partner and see if she also feels the same way or what her perspective is on this.
it would also help if you could come for chats and discuss about this in more detail.