To add gravity to our planet, you need to download a free plug-in from the Marketplace
My example for Ninja Character Plugin
Add plug-in to the engine and start the project
To make the plug-in work, you need to turn it on
Now you'll be able to access the gravity character, go to the Modes' Modes project settings, and select "NinjaGameMode_BP"
NinjaCharacter uses to manage standard input settings, if you need to test quickly you can download DefaultInput.ini
Unfortunately I didn't understand how to use it with Procedural Mesh, however it works well if you add the usual Static Mesh to the planet
For a quick test, open Level Blueprint and write the code below
To prevent the character from climbing on objects from the surface, turn off this item in the character's settings