Linux (or any desktop) platform with opengles for speedup

[mono]

Hello, everyone.
I searched long time to run cocos2d on Armbian_5.38_Orangepizeroplus2-h3_Ubuntu_xenial_default_3.4.113_desktop.
Now it run but very slow because device is orange pi zero plus 2 (mini com like arm).
when build project, it automatically works for desktop with opengl.

We already compile & run new cocos2d-x-3.15.1 cpp project on Armbian. FPS is 30.
If we make this project work on opengles, fps will rise. Have you got issue?
I guess if i change this to opengl es then speed will be ok.

Because on Android on same device, apk's fps is 60.
Please help me.