I've never used Sketch Runner, but you can search assets in Figma which appears to be 90% of what you're looking for. 1 minute of searching also reveals a plug

I've never used Sketch Runner, but you can search assets in Figma which appears to be 90% of what you're looking for. 1 minute of searching also reveals a plugin called "Figma Walker" which, as the name implies, is an attempt to copy the exact functionality of Sketch Runner.