Hello Chaumomo
All routes: free but only via Zweiluetschinen, not valid via Kleine Scheidegg.
3/ Valid only via Gruetschalp.
You have currently a bug in the Rail Planner, it is not possible to add a journey Lauterbrunnen - Wengen because the train continues to Kleine Scheidegg and the pass is no more valid after Wengen. You can add this journey manually.
You can find the area of validity map here:
https://www.interrail.eu/content/dam/_new-structure/doc/res/See_Switzerland_by_train_2024_Geltungsbereich.pdf
Kind Regards
Danhiel