They can’t fixate about that anyway, because of the inconsistency between III and VI (“Leia didn’t get the question that’s all, no way she can remember our mother !”).
Well in Shattered Empire (I think) Leia felt some sort of connection to a picture of Queen Amidala. Plus I’m sure by the time Leia and Han conceived they had been told by Luke about Anakins history. Assuming they kept in contact.
I for one am amused by the idea of Luke Skywalker throwing Han Solo’s funeral procession into chaos.
The funeral would be an opportune time for The First Order and/or The Knights of Ren to attack our heroes.