I was bold and did a similar thing to what @Aklapper did in T412580: Grant TausheefHassan edit access to auto-created Toolforge Phabricator project (Tool-pid-bangladesh-uploadbot) & added you to that project's edit policy, so you should hopefully be able to create the workboard yourself now :)

(See also T412607: Ensure that auto-created Phabricator projects for Toolforge tools are always editable by that tool's maintainers, which would hopefully prevent tool maintainers from needing to file tasks like this)