this may sound simple but have you checked the tyre pressure and the tyres. This may be your first check before you get to the suspension...
I'd probably check in this order:
Tracking
Track rod ends
Track rod inners
Steering rack
Bottom arm bushes
Suspension top mounts
Shock absorber play in the shafts
TBH there are still other things it could be too, an extreme example being loose subframe bolts, lol
had the ball joints done 2 months ago.
How would the above be checked?