Hello,
I’ve encountered the same problem as you, and even if the solution isn’t the most elegant, it works! Here’s how to modify your sprite collision settings in UE 5+ :
1. Copy the parameters from the source collision:
Position your cursor on the collision whose parameters you wish to copy.
Use the keyboard shortcut Shift + Right-click to copy these settings.
2. Edit parameters in a text editor:
Paste the copied parameters into a notepad or other text editor (with Ctrl + V).
Modify the desired values, such as the box size in your case.
3. Apply the new settings to your target collision:
Copy the modified contents of your notepad (with Ctrl + C).
Return to Unreal Engine and position your cursor on the collision parameters you wish to modify.
Use the keyboard shortcut Shift + Left-click to paste the new parameters.
Your collision should now be successfully modified!