How do I make a mob climb all the blocks when you ride it?

I found a mod where there is a realistic version of what I want, tell me or hide the procedure, I created 2 mobs, one with a saddle, the other without it, when you put a saddle on one and control it, it can not climb blocks how to fix it? Here's a mod that has what I want to do.https://mcreator.net/modification/105103/lynx-ride