Look around the forum, similar questions all got for reply: no, because it is no in AOSP, and if it is in other distribution (lineageos...), switch to them if you want these features.
+1 for the query that I share (I wish to have the date). I observe around me that the lack of bare customization of GrapheneOS somehow deserves the project, despite all its other excellent features on privacy and customization (and for which I thank developers a lot). I can understand why for several reasons, but end users to which I try to promote the project simply do not accept it.
Sorry, dears, for this copy/paste of my answer on 2 other posts, they come from very similar facts.