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I fly old 747-200s...
We are operating down to Cat.II minimums.
Once or twice a year, we may have to complete a Cat.II approach/landing.
The planes were Cat.IIIa certified long ago, expensive maintenance.
The 747-200/300s had Cat.IIIb capability, but never were certificated as such.
Not worth the few actual landings requiring that certification.
None of the airports we operate to require us to have that capability.
So, now Cat.II only is all we need...
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So yes, we "practice" all that in simulators, once every 6 month...
We play Cat.IIIa, or even Zero/Zero Cat.IIIc autoland... for fun...
It is all about moving switches ON/OFF and push buttons anyway...
Planes do it fine if ever needed...
As simple as that.
Happy contrails.