Scott I have no root user. How-To get root?
Standard builds of GrapheneOS do not have any way to grant root access (other than exploits, which the team works hard to prevent/remove!).
It is possible, but strongly dis-recommended, to do a non-standard build on one's own. Unless one is a serious Android security expert, though, it is fairly likely that going down one of those paths will result in a device with seriously-compromised security.