Why Aren't the Little Sprites Showing up in the Animation Dopesheet Window?

I'm following with a book called Mastering Unity 2D Game Development 2nd Edition, but for some strange reason I can't see the little sprites that show up when you drag and drop sprites from a spritesheet. I enabled Sprite Renderer, I sliced using automatic and bottom pivot. It looks like I've done everything right, but apparently something I'm doing is wrong. Circled in black is what I'm dealing with. I see the frame markers but no sprites. Please help me. Here's what I have:

https://preview.redd.it/ei7a110osj0e1.png?width=2048&format=png&auto=webp&s=02658db0b988c9f557d6a1abc766ae27c2e6c648

And here's what I want:

https://preview.redd.it/s1gnax3rsj0e1.jpg?width=3000&format=pjpg&auto=webp&s=1b01545c2d44975ad762df81de0c70be95e78814

As you can see there are sprites showing up in the keyframes, but my Animation window doesn't show that

https://redd.it/1gpxole
@r_Unity3D

Okay, I know it's not much, but it's the first enemy in my game, and I'm excited! Haha.

https://redd.it/1gq2fm2
@r_Unity3D

Making progress on the Spore successor I'm solodeving.

https://redd.it/1gq44k1
@r_Unity3D

I work during the day and create dungeons at night.

https://redd.it/1gplj2i
@r_Unity3D

hey 😄, I'm not the dev, but there is a bug on a game called Promenade, I know that it was made on unity 2d and the developers couldn't solve it... so I'm trying my luck here, anyone have idea ?

https://redd.it/1gq7382
@r_Unity3D

From $23.83 to $0.17 On all my asset for few days!
https://itch.io/s/129003/big-exception-now-or-never

https://redd.it/1gphr3m
@r_Unity3D

I keep redesigning the enemies, this time a demon with a revolver!

https://redd.it/1gqa9sy
@r_Unity3D

I’m working on a cozy simulator game where you run a tattoo removal clinic! It's still in the early stages. 🙈 What do you think? Would you play it?

https://redd.it/1gqaqj0
@r_Unity3D

Roboholic - A first person shooter in the roguelite genre

https://redd.it/1gqa9gw
@r_Unity3D

What is the best way to preserve the state of some objects in a specific scene?

Hi guys, I’m currently working on a top-down RPG which already has a JSON saving system, which I can use to store data between scenes, such as the character's equipment, health, time of the day, etc.

The thing is, I also need to save stuff that are only loaded in a specific scene, for example, an open chest on the second forest map, the position and HP of a boss enemy inside a cave scene...

What's the best way to do this? Thanks in advance

https://redd.it/1gqen22
@r_Unity3D

Any ideas? Collider type is none but the sprites still have colliders

https://redd.it/1gqfph9
@r_Unity3D

Draw shadows or unity shadows?
https://redd.it/1gqhjb4
@r_Unity3D

QTI — a powerful and flexible framework for creating complex behaviors in Unity!

https://redd.it/1gqf2sg
@r_Unity3D