But game only comes with 20 and bought both of needed expansions for 5-6 but no fear was added to game
Yeah, they don't include extra fear tokens, energy, or defend/reminder tokens for the extra spirits. I agree that it's a little inconvenient, but I don't know enough to go into the reasoning. Luckily, these are all things that can be proxied reasonably well (as opposed to e.g. invader pieces, which really need to look the same).