Resolve GA4 Landing Page Attribution Issue

I run an e-commerce site and roughly three out of every ten sessions are showing a blank “Landing page” dimension in GA4. Those same sessions often end up classified as “Direct,” so orders that may have come from paid or organic channels are being robbed of credit.

I have an issue with GA4 failing to identify the landing page for about 30% of sessions. The main concern is the attribution of certain "Direct" orders: these could be sales generated by other channels that GA4 is not correctly crediting. I need to rectify this situation.