Status updates on the front page have this little 'Interact' button next to them that allows you to open them in a window where you can like or reply to them. This button has a horizontal three-dot icon. The problem is that on other platforms this horizontal three-dot icon has a different purpose. Horizontal three-dot buttons serve the same purpose as vertical ones, except they are only used on Apple systems. I would suggest using something like the Material Design unfold_more icon.