Gub was posting it yesterday but I know you were busy packing so probably the posts didn't register when you were trying to catch up.
Make sure you are at the parlay you want to embed, not an echo of it. In the bottom right corner you should see a symbol like this:
Click on it. A box will open up titled 'Embed, Share, Parley'. The upper part will say 'copy URL'; the bottom part will say 'copy code'. You want click on the purple button saying copy code. Then paste it into the message.
This WILL not allow the date hyperlink to go to the original Parley. To do that, before you post the message, you have to then copy the url in the upper part and paste over part of the code you just copied. If you want to be able to do that, it might be best I made a second post for those directions.