i got a loose on my front wheel bearing on the passenger side. on the end of the hub it has the round lock with 4 philip screwdriver head holding it to place, can i tight the bearing there? looks similar like the old ford ranger i had before. but it kinda dosent make sens to me cuz its a press in bearing

I think (from your description) that round lock you are referring to is the wheel bearing lock nut.   Suzuki (and Chevy for the the Trackers) have a special socket tool with four small studs on it (6mm?) to remove and install these wheel bearing lock nuts in these trucks.  The factory torque on these nuts is 159 lb ft.   If this nut has never been removed I would suspect the bearing is failing versus it has loosened.  The front wheel bearings on these trucks can be damaged from side impacts (really hard slides or actual jamming them sideways into objects).  Of course if the inner seals have been compromised it could simply be dirt infiltration too.

I have read several posts saying they removed these nuts with a punch and hammer (because they lacked the factory socket tool)... but I seriously doubt anyone has properly installed these round lock nuts to the proper torque using a punch and hammer and therefore the life of the new bearings would be compromised to some degree.