There's already an open feature request in the issue tracker, possibly by the same person. It has had the issue type "feature" added, which means it wasn't rejected. Maybe someone can make this change and submit a PR and if it was done well, the developers may merge the PR. I don't know if any GrapheneOS developers will work on this anytime soon because the issue wasn't assigned a priority.
Leaving this thread here in the meantime in case people want to discuss. If you find the issue in the issue tracker, please don't add more comments or posts there. If you want to indicate that you want the feature, feel free to add a positive reaction like a thumbs up or something.