Vica153 Is this function still not working? It does not seem to work on Pixel 6.
If you have observed it not working, that is consistent with the status of the GitHub issue at the top of the thread. Subscribing to that issue might provide advance notice of progress and might register interest.
But since the issue was closed as "not planned" it is not likely to be fixed soon. For example, one might imagine the GrapheneOS developers would prioritize tablet support before this.