menu in the top left The Main "Hamburger" Menu (☰) - Top Left  -> Share or Embed a map -> click embed a map -> copy and paste the embed map code to a jdnotes comment
Top Right three dots menu no Embed a map

Or use Mac Google Map.app:  Top left -> menu -> share or embed map -> click 'embed a map' not Copy Link

Can not show directly from google map URL.  

google map direction -> top left -> menu -> share -> click -> embeded.  however, no altitute shown