That's a pedal steel guitar.

https://www.youtube.com/watch?v=-HFScARZ8Ak

You can approximate it on an electric guitar with a clean tone, lots of reverb & of a metal slide!  Play A shaped triads on the D-G-B strings.  You can also retune to an open chord.  Anders shows how to play with a slide in the Blues course.

https://www.guitartricks.com/lesson/13461

Anders also does a great job of showing how to mimic pedal steel on electric guitar in the Country course.

https://www.guitartricks.com/tutorial/2077

https://www.guitartricks.com/tutorial/2063

https://www.guitartricks.com/tutorial/2362

Hope that helps!