themaestr0 the 'time' you'll be waiting for it just as an FYI will be dictated by AOSP not GrapheneOS.
Visual/Theme elements not specific across the OS are out of scope for our core dev team, when the goal posts are constantly moving regards tech privacy/security their eyes must remain on the ball in that field of play.
We do however appreciate little QoL improvements like this but for them to be achievable while also being maintained and so forth will require increased funding etc.
If all GrapheneOS users donated even the smallest amount via any of the options mentioned https://grapheneos.org/donate the sky would be the limit. It isn't the size of donations that is most important small regular amounts would enable the project to do so much more.
We appreciate everyone regardless however, just hope you can appreciate why such things aren't always addressed or as quick/given the priority some would like.