It’s because they aren’t installing the correct bulbs. Some dimmers work by cutting the ‘pulse’ that goes to the light early, some of them work by lowering the voltage/current.
When you install a direct LED to one that cuts the pulse, you get flickering. Incandescent bulbs don’t do this because they’re white-hot and don’t change luminosity fast enough for you to notice.
Basically: If they’re flickering – they did it wrong.
This is what everyone had (wrongly) claimed when Palworld initially came out. Looks like they finally decided to pull the trigger. It’s not going to be successful at all, but Nintendo is the Disney of Japan.