Sure, these are the steps.
Login to the IDE at https://graph.api.smartthings.com
Select My Device Types
Click on +New SmartDevice
Click on the From Template tab at the top of the page
Select Z-wave momentary virtual contact switch from the menu
Click on Create
That will open the source for you in an edit window. The delay you’re looking for is on line 95. You should change the name of the device type just so you can tell the two apart. After you make your edits, click Save, and then Publish [For me].
You can change your LFM’s device type the way you did before in the IDE.