I can confirm now that are no issues using Shizuku and LSPatch for this use case. Provided the instructions on the SnapEnhance repo are followed, it works fine. I don't know why the thread was closed as solved earlier but OP's question is finally answered.
Could maybe even say it's security and convenience at the same time :^)
Despite this, there are other issues with GrapheneOS which make it unusable for me :D