Is it possible to set up up 2 different run walk activities.

On my Fenix 7 x solar I can set up (for example) 9 min run 1 min walk, but id I want the option of adding a 8 min run 2 min walk, it's not even in the menu until I delete the first. Reason, I'm doing my 1st ultra marathon soon and want the option to switch between the two. It looks like I'll have to create one mid run?