btw you would be surprised how many very capable SEP IFR tourers have approach certified A/Ps....even the venerable KAP150 is approved down to 200ft...
I not that surprised being very fortunate to fly aircraft at both ends of the spectrum, from multi jets to SEP/MEP light aircraft and holding MPA and SPA IR's.
The difference in auto-pilots being "approved and actually being capable" of performing the task, certainly in a crosswind situation with 550m RVR.
Having flown the PA46 in crosswind conditions during low vis approaches I can confirm its auto-pilot performance was not that spectacular low down on an approach with a crosswind.