The only grenade that remains universal is the fragmentation grenade — it’s available to every class.
Although Battlefield fans had urged the developers to bind weapon types to specific classes in Battlefield 6, the studio has for now chosen to apply that restriction only to grenade types.
Each class — Assault, Recon, Engineer, and Medic — now has access to a distinct set of grenades. Assault players can equip stun and flash grenades, Engineers get anti-tank explosives, Medics carry smoke grenades, and Recon has a sensor grenade that tags enemies on the minimap. The fragmentation grenade remains the sole multi-class option, usable by every role.
Source: iXBT.games