According to this, the current Unity rendering options are:

• OpenGL ES 2
• OpenGL ES 3
• Vulkan (experimental)

Android also has a rendering layer called Skia. I don't know whether or not Unity makes use of Skia or not. From what I could tell digging through the documentation, Skia uses Open GL on the backend. (SO post of possible interest: How do the pieces of Android's (2D) Canvas drawing pipeline fit together?)

It's a common technique to use a 3D API like DirectX or OpenGL for 2D rendering - for instance, a lot of game UI gets handled that way.

According to this, the current Unity rendering options are:

• OpenGL ES 2
• OpenGL ES 3
• Vulkan (experimental)

Android also has a rendering layer called Skia. I don't know whether or not Unity makes use of Skia or not. From what I could tell digging through the documentation, Skia uses Open GL on the backend. (SO post of possible interest: How do the pieces of Android's (2D) Canvas drawing pipeline fit together?)

It's a common technique to use a 3D API like DirectX or OpenGL for 2D rendering - for instance, a lot of game UI gets handled that way.

According to this, the current options are:

• OpenGL ES 2
• OpenGL ES 3
• Vulkan (experimental)

According to this, the current Unity rendering options are:

• OpenGL ES 2
• OpenGL ES 3
• Vulkan (experimental)

Android also has a rendering layer called Skia. I don't know whether or not Unity makes use of Skia or not. From what I could tell digging through the documentation, Skia uses Open GL on the backend. (SO post of possible interest: How do the pieces of Android's (2D) Canvas drawing pipeline fit together?)

It's a common technique to use a 3D API like DirectX or OpenGL for 2D rendering - for instance, a lot of game UI gets handled that way.