Best pratiques and lazyLoadig

Hello people… Im building a app that show lots of information… and a WEB PWA that i can post this information to show in the app… using firebase as backend… that app and the PWA are really big.

So i was wondering what is the best pratiques to do this…

Should i lazyLoad ALL the pages in my app and PWA ? including the loginPage

or should i just lazyLoad the pages less visited? and keep the “mainPage” not lazyload…

aprecciate all the infos…
thanks guys!!