Scribble
Scribble was not working and it didn't even give me the option to choose it on settings. So, I have figured it out, since I don't use the English keyboard I removed it and only left the Spanish keyboard. At the time scribble is only supported by English and I think Chinese. Now that I have added the English keyboard when I go to settings - apple pencil - scribble is available. Hopefully soon it will be in other language so I could use it.
I hope this helps someone because I have researched it and never found the answer. I have the IPad 4th generation with apple pencil 2.