> Which exact voting rights are missing at the moment?
And the answer, as reported in various places, is that the right to vote is for all intents and purposes non-existent for people in certain areas. Voter disenfranchisement is a real and documented thing. Polling places are shutting down, which puts an undue burden on people who don't have the luxury of taking the day off or getting out of work early.
You might appreciate a tech example: if Facebook doesn't actually remove all of your data, just "deactivating your account" while keeping the data stored on their servers, do you really have the option to opt out of Facebook?