https://www.gymnasticbodies.com/forum/topic/3750-prerequisites/
In there, Joshua mentions that Coach normally has people work an L sit PRIOR to beginning any serious planche work. Well in Foundation, assuming you work only the Straddle Planche and not the Manna (or even assuming you built slower in the manna such as myself who struggled greatly at leg lifts at a certain point prior to working on L sits) you may very well begin very serious planche strength training prior to ever even touching a leg lift.
Why is that? It's got me very confused