On survival expert mode worlds, meditation is disabled. And sleeping to fast forward only works for a few minutes at a time, then your bh wakes up and you have to run around getting tired before you can fast forward again. But I accidentally discovered how to fast forward indefinitely, even on survival expert mode worlds.
It’s pretty simple - you just start your bh sleeping, and once the world is fast forwarding, you press pause. The world stays in fast forward and your bh never wakes up. You can fast forward for hours at a time if you want to! This is great for getting pole items, hatching eggs, growing farms, etc etc etc.
If you slide the screen so that you can keep an eye on whatever you are waiting for, you just take it off pause and wake up your bh whenever needed. Remember that the center of the screen will be blocked by the pause menu, so put what you want to see off to one side, or at the top or bottom of the screen.