It still works and at least somebody still seems to work on it going by the somewhat random GL-related fixes and regressions in macOS Betas since GL was declared deprecated.

AFAIK ANGLE (and MoltenGL) only provide GLES2.x and GLES3.x over Metal, so out of the box those wouldn't be very useful for providing desktop-GL compatibility.

Apparently Zink on top of MoltenVk on top of Metal works, but that looks like a Jenga tower of emulation layers.

Ideally, Apple would rewrite their OpenGL framework on top of Metal (if it hasn't happened yet), and keep that working at least into the 2030s.