Wrong.
It will use the same system as BF2042 which is Portal.
For those (like me) who didnt buy 2042
Battlefield 2042’s Portal feature lets players create and join custom games using content and rules from multiple Battlefield eras (BF1942, BFBC2, BF3, BF2042), offering deep customization of gameplay, logic, and more. Instead of a traditional server browser like in Battlefield 4—where you simply filtered and browsed user-run servers—Portal uses an “experience browser” for discovering custom modes, but also allows game creators to publish their sessions for others to join.
Cons:
Less straightforward UI than a classic server browser
No persistent player-owned servers (they spin down when empty) (aka game dead in 5 years)
Some fragmentation/confusion due to multitude of custom modes
Traditional server admin features are limited compared to BF4
So no third party server support = dice will do their best to push us onto BF7 in a few years.