Hi there,
couple of options
1. Customizer > Layout > Container –> Content Layout – change this to Separate Containers
This will move the container padding inside the articles.
Then in Customizer > Layout > Blog –> Featured Images you can remove the padding from the image.
or
2. Use this CSS:
.generate-columns-activated .inside-article .entry-header,
.generate-columns-activated .inside-article .entry-summary {
padding-left: 20px;
padding-right: 20px;
}