i unfortunately have had the same issues with my RADEON VEGA 56
i just purchased a laptop with Ryzen 2700 8 core processor with AMD graphics chipset
with the promise of it being a rendering beast, but for interactivity in after effects its a NO GO
if you or anyone finds a solution to this seemingly widespread issue of adobe ae not being able to utilize the opengl please let us all know
aside from Element3D, Trapcode Particular also benefits GREATLY from using the GPU
but the selection under preferences>>preview>>CPU/GPU is greyed out no matter what i do
i've tried installing,uninstalling, using old legacy catalyst crimson software, and nothing