Minecraft version
1.17.1

Mod version and malilib version
Litematica v0.0.0-dev.20210906.183617
Malib v0.10.0-dev.24

Description of the bug
I Can't select any modes besides "Schematic Placement", "Edit Schematic", and "Area Selection".
I'd like to select Rebuild Mode, but it just skips past it. Pretty sure i am just missing something here, but i can't find out how it's done currently. (I Selected the schematic i am working on via the Litematica menu)

Yep the Rebuild mode was renamed to the Edit Schematic mode recently, as the old name was confusing for many new users. They thought they need to be in that mode when "re-building" the stuff in the schematic in the world. although the name was supposed to mean that you are re-building the schematic itself or parts of it. So the name Edit mode better describes what it actually does and is used for.

And all the other modes are only accessible in creative mode, as they are creative-like functionality, such as pasting and deleting areas.

Just found out this is intentional behaviour, and it seems i will need to compile the jar from source to fix it.

Turns out it's neither and i seem to have looked at old docs where names of modes were different

Yep, name change just had me confused, that's all. Thanks for the replay regardless 👍