Step 1: Go to steam and go to ksp2 (obviously)
Step 2: Click the right settings icon (manage)
Step 3: Click "Browse local files"
Step 4: Right click KSP2_x64.exe (might be x86 or x32)
Step 5: Select properties of the file
Step 6: Copy the location
Step 7: Go back to manage but then to properties in steam (make sure to be in the "general" tab
Step 8: Edit "Launch options" and add the copied location
Step 8.5: Add \ and then paste your ksp exe file name (with .exe on the end) after.
Step 9: Add another " after your ksp2 exe name
Step 10: Add a space and then %command%
It should look something like this: "drive name (often C):\steam\steamapps\common\Kerbal Space Program 2\KSP2_x64.exe" %command%
Hope this helps!
pls mods dont remove this see this as an idea instead and please make Tutorial 🤓 tag for posts, would be useful.