You can create a New Journey + Playthrough based off this save file to carry over All Stances, All Perks, All Customisation (excl. Outfit Colours), All Skills, Map Upgrades unlocked. But all Chests, collectibles and Force Echos are locked and available.

This NJ+ ready save file has everything at 0% and locked except for the cosmetics (excluding outfit materials/colours).

This NJ+ ready save file has everything at 0% and locked except for the fully unlocked map upgrades.

This NJ+ save file has All Exploration Abilities, Map Upgrades, Skill Trees and Stances Unlocked. Skill points are 0. Beware though, accessing areas when you're not supposed to yet can corrupt your playthrough. You have to load this save in main menu.