How to reduce page load speed with client-side rendering

We currently have our core product built on React & hosted on AWS. There are Segment event triggers that we have set up in our core product code.

Planning to use Webflow to build our landing pages.

We need to pull live data from our backend database (e.g. user’s name, newly posted content). However, our CMS sits in our core product - so we are not building a CMS on Webflow. Hence, we are using client-side rendering to pull live data from our backend database, which causes an increase in page load speed.

How can we reduce page load speed while using client-side rendering to pull live data from backend to appear on Webflow landing pages?