Liking songs on Android Auto

[WayCoolJr]

Plan

Premium

Country

USA 

Device

Pixel 4 XL 

Operating System

Android Pie

My Question or Issue

I am new to Spotify (coming from
Google Play Music). I went thru and manually added all my liked songs from GPM. When listening in my car on Android Auto, I listen to one of my daily mixes. How do like one of the songs being played?I see the
"heart" button on the android app,
but not on Android auto. When I hit the 3 dots (like I did for GPM) all see is a check mark. Am I missing something?

[TaTHEj]

Its the "heart" button

[WayCoolJr]

There is no heart button. See attached pics. 

[TaTHEj]

Can you send a screenshot?

[WayCoolJr]

See my post above. I edited it with pictures. 

[TaTHEj]

What does this button do?

[WayCoolJr]

When you tap it, it changes to a "+" 

[TaTHEj]

So that adds it somewhere. Can you try and see where it goes?

[WayCoolJr]

I know it doesn't go to my liked songs. So I have no clue. 

[TaTHEj]

I guess it's not available on android auto. About that button look at all your playlists, I think it saves it somewhere.