I wouldn't be overly concerned. By the time you need shocks/struts it might be worth while to look at replacement but that should last you many years yet. I looked under my older Durango the other day, and there's nothing that isn't rusty, not even the shocks.
As mentioned, you can sand the rusted areas down and either prime & paint, or if it was mine, I'd just put a coat of oil over top and keep it up every few months. Once rust has started you can't stop it completely without properly removing the part and getting it professionally blasted and recoated.
'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019
'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)