You don't have to request anything.
If the wx requires LVP then the Airport ATC will activate it.
If you wish to do an Autoland in CAVOK then go right ahead remembering that the protected areas are not protected and its up to you to be ready to takeover as needed.
Some operators won't allow this practice ( stupid ) and some operators insist you advise ATC.
Whatever, it doesn't matter.
My company allows it to Runways that we have approved for Autoland.