Is there cooling service for the outdoor unit?

I have never called for cooling service, but i suppose what to do for our a/c.

I l acquired the usual amounts of coolant to put in our machine.

I suppose mold gets on the cooling coil and that it needs to get removed or our air quality will suffer. I change the air filter biweekly to avoid dust. I also disinfect up our condensate drain since the excessive water tends to promote algae growth. I lubricate our fan motor belt, disinfect the fan blades and tighten any loose screw. I do believe prefer quite the AC specialist afterwards, however the only concern is the outdoor equipment with our a/c. I have no idea what to do for that outside unit. I am thinking the outdoor component must be a little more heavy duty. I mean our outdoor AC system sits in some pretty harsh elements. I get feet of snow and ice in the winter! Frequently ice falls on top of the unit. There are no dents or rust from the snow melting. In the Springtime the rain comes down for weeks at a time. I can’t see any mold, mildew or other bacteria growing inside the device… Yes, it does look a bit dirty; But, I am wondering if it matters if the outside equipment is dirty. That air is not being blown into our home, does the outdoor equipment need something done to it? Could our AC be more efficient? I won’t call an a/c business. But, I will absolutely research to see what I can do with our outdoor unit.
Is there cooling service for the outdoor unit?