How to know its the driveshaft?

Can be wheel bearing too?

I believe wheel free play only happens at the late stage of wheel bearing problem. To really confirm it's the wheel bearings, need to ask mechanic to jack both the front wheel, start the engine and let the wheels to freely spin. Observe if there's any abnormal movement.

Plus it looks like you already replaced most of the front suspension. Might also just replace everything at this point, but start from the cheaper part first.