I've extracted the mods to the "mods" folder in %appdata%, but when I launch the game, I don't see an option to load the mods in
Viewing post in Aric's Expansion Rebred
I'm assuming you found the Mods menu from the main menu and that you were not met with a long list of errors when the Mods menu was accessed. But if that were the case then you most likely have a permissions issue that prevents the program folder from creating new folders and files. This is solved by extracting the game to a location with open permissions, like the desktop, documents, or %appdata%.
The most likely user error is that you changed the path to the mods folder in game. In bottom right corner of the mods menu is a button for "Open Mod Folder" and to the right of it is a button that has your path to the mod folder. By default the path should be "user://mods/" (equivalent to "%appdata%/Strive/mods"), and while any folder will work it can confuse users that change it by accident. There is an arrow to ascend folders in the top left of the folder selection dialogue, and there is a difference in the selected path depending on if a folder is selected. If this is the case, then you will have a duplicate instance of the Constants mod at the current assigned location. The Constants mod should be visible in the list from the second start of the game and onwards, regardless of the path.
Another possibility is that you extracted the internal files of the mods into the "mods" folder directly rather than extracting them into a new folder with the same name as the archive. Mods are identified by the mod system using a combination of the location of the info.txt file, which indicates the root folder of a mod and the mod's root folder name. Though the mod system should have given you a bunch of junk mod names if this is the case.
The last possibility that comes to mind is that somehow the mods were placed inside another mod, as the mod system will probably only see the highest level mod.
If none of these are the case, then I will need more detailed information about the files and folders. Perhaps even a few screenshots(you may erase any personal information) using the Snipping Tool, which generally comes with Windows.