I use the clipboard and snippets a lot for work, and we often test our websites in different Operating Systems and Browsers by means of VirtualBox. I use automatically expanding snippets to save time, but I noticed the snippets and the clipboard do not work inside of VirtualBox. I've used a program called aText (https://www.trankynam.com/atext/), which is able to paste into VirtualBox, so I believe it's possible.