Powerlevel10k is a theme for ZSH. This screencast shows how it can be configured via its built-in configuration wizard.
To run the wizard, type p9k_configure. After asking a few questions it will write your personalized prompt configuration to ~/.p10k.zsh and append a line to your ~/.zshrc that sources the new config. To try another style, run p9k_configure again.
To try different prompt styles without making any changes to your config, set ZDOTDIR before running p9k_configure: