Fonts are not displaying clearly

I am building a react web application, in which I have used onset and Roboto font styles.
The below attached image is from webview

Where the fonts are displaying clearly.

But when I install the application in LG, the Font are not displayed clearly.
I hereby attach the image from LG TV

And also I attach the screenshot from debug mode

Please check the supported app resolution from your TV and make sure your app is suitable for the resolution. Thank you.