No, not quite
Until now, wireless speaker bod Sonos has required one Sonos device (either a player or a bridge) connected to a home wireless router to set up a mesh wireless network delivering . . .
There, fixed that for you.
Sonos does not require a separate Bridge device as every player has that functionality. The Bridge is used where it is not possible or is inconvenient to connect one of your players to your LAN. Or where you have a player not connected to your LAN and which is too far away from another connected device for a reliable signal i.e. the Bridge can be used as an extender by placing it part way between devices, though until this latest update it would need a physical connection be able to do that.
Every time I see something written about Sonos it always seems to contain basic misunderstandings about the need for a bridge and/or the "mesh"..