If your employees are serving customers, let them take frequent 10 minute breaks to use their phone or be away from humans.
Is comically absurd.
GenZ are not the first people to have things they'd rather be doing than work, or to be tired due to human interaction. The latter is called emotional labour and has been a thing across all service industries for literally a hundred plus years.
I'm not saying that people don't need breaks, everyone does, especially in jobs which are physically/mentally tiring, but to say people need frequent breaks solely to check their phone is derisible.