IMO you’re right to be scared to use an acidic wheel cleaner on diamond cut alloys, as these acid-based cleaners can ‘eat’ into and destroy the lacquered surface, leaving the wheels looking cosmetically awful - dull and tarnished and very similar in appearance to white worm corrosion. If a specific wheel cleaning product is needed, then I’d recommend using a ph neutral, acid free cleaner, even if it does take a bit more effort.
However, I’ve found that if wheels are decontaminated, sealed / waxed with a good quality sealant / wax, and washed regularly (every 7-14 days) and sealant / wax reapplied every 3-4 months, they should be pretty easy to maintain and brake dust build up shouldn’t really be a problem. It should only really be necessary to wash the wheels with a good quality ph neutral shampoo, rather than having to use a specific wheel cleaning product.
