From the Picard showrunner Terry Matalas comes this tweet
They’re an off-shoot from an alternate timeline that have stayed out of history’s way. They are not the the Borg. I’d imagine the real Borg are licking their wounds still in the Delta Quadrant after Alt Admiral Janeway poisoned them.
The latter part is a reference to a scene from VOY: Endgame (ADMIRAL refers to Admiral Janeway)
BORG [OC]: Voyager has entered aperture eight two three. Access
transwarp corridor zero nine. Redirect vessels to intercept at
(The Queen gets an electric shock. The Borg voice becomes garbled.)
BORG [OC]: Corridor. Nine. Voyager. USS. S zero zero nine
transwarp transwarp intercept.
(Things go bang around her. She grabs a stanchion to stay upright.)
ADMIRAL: Must be something you assimilated.
QUEEN: What have you done?
ADMIRAL: I thought we didn't need words to understand each other.
QUEEN: You've infected us with an neurolytic pathogen.
ADMIRAL: Just enough to bring chaos to order.
So, based on the tweet, plus Voyager canon, it appears that the Jurati Borg are not the same as the previously known Borg. In other words, there are now two Borgs races.