Lost my outdoor walk on my watch

It worked but I had to wait a day or two for "Outdoor Walk" to appear as one of the choices. It wasn't there at first, but now it is.

I have the same problem but no one replies how to get it back.

Go into the workout app on the watch and scroll down to the bottom and tap on add workout, a list of 78 workout types will appear,just tap on outdoor walk and it will be added back to your list