The laws of noble inheritance are complex and difficult for non-professionals to understand.
Simply put, the Late Emperor is only missing, not deceased, so Sif cannot inherit the domains of the Imperial Family. Her private domains consist only of the two Earls' Domains of Tyrone and Mangster.
These two Earls' Domains aren't large, with only a few Baronial Domains under them.
When Roland suggested offering some lands as rewards, she hesitated.
"Roland, those places are kept for you."
Sif wasn't unwilling to part with titles and lands; she simply didn't want to give away her homeland to others.
Seeing her reluctant expression, Roland immediately understood.
Sif was emotionally attached to her private lands and didn't want to divide them among outsiders.
Seeing her pained expression as she prepared to reluctantly agree, an idea suddenly sparked in Roland's mind.
"There is a way. We can submit the list of commendations to the council for approval."