@malwaretech The first cycle indeed just rinse, but that is not useless as there are lots of stuff which is removed that way. It also uses cold water, so that the powder will not be much effective.
Most dishwashers can operate this "rinse" cycle alone, you can see for yourself how effective it is. I normally operate it if I only have half a load so that the dishwasher will only be run the next day.

I would doubt advices from TikTok, in general.