England are making their first appearance in an ICC final since the 50-over World Cup in 2022, where they were beaten by Australia, while their last global trophy win came at the same ground in 2017.
Sciver-Brunt is one of three players involved who was in the squad for that tournament, alongside former captain Heather Knight and batter Danni Wyatt-Hodge.
With the increasing professionalisation of women's cricket in the nine years since and the record-breaking crowd numbers at this tournament, Sciver-Brunt says Sunday's final could be a more significant occasion.
"Where the game was in 2017 compared to where it is now, is a huge leap," Sciver-Brunt, 33, added.
"Tomorrow's game will show that. We know it's been a big deal, obviously we don't really know how it's looked or felt from the outside but certainly to play in it and to be part of the record-breaking crowds and some exciting games, yeah we have felt that [importance]."
The England captain also played down the significance of Sunday's opponents, considering their recent history against Australia - particularly the 16-0 Ashes thrashing at the beginning of 2025.
"Our team has come a long way since that Ashes tour," she said.
"I think everyone knows what tomorrow is about, a World Cup final at home at Lord's, the occasion is already massive.
"There's not really been any talk about the Ashes or proving people wrong from that."