Figma team released awesome online whiteboard FigJam. But, initially, there was a problem creating simple wireframes.
That is why the Product Desinger, Denis Danilov, created a library for wireframing, Stratum Wireframe Kit, and shared it with everyone, completely free.
It supports Auto Layouts and Variants. Also, you can find the Setup guide inside the file.
So, go to the page, get a free library that adds a missing wireframing components to the new Figma’s online whiteboard and create simple wireframes in FigJam.