If the Pro package includes one SVG sprite file, you can add that file in a theme or a theme component, and reference it as an asset with the variable icons-sprite:
"assets": {
"icons-sprite": "/assets/my-icons.svg"
}
If there are multiple sprite files in Pro, you might want to add them to a plugin.
Add each SVG sprite file in the plugins/your-plugin-name/svg-icons folder and then restart your server (if in dev) or rebuild the site.