That's a disappointment, and in the screenshots, the app actually doesn't look native at all. The new Liquid Glass design, with the round search boxes and transparency, is nowhere to be seen.
Therein lies a detraction to making native apps. Binding yourself to how native apps look now will be a liability. People will judge you as outdated when the operating system moves on to a new groove.
That only applies to faux-native apps built in Electron. Actual native apps are rendered using the OS's UI toolkits, and look however the OS is configured to look.