Exactly.
Those characters were nothing like Superman.
Steel in particular didn't even have powers and just wore a suit. He was absolutely NOTHING like Superman. Extending it further to the comics John Henry Irons in particular never claimed to be Superman during Reign of the Superman because he was not a "Superman". He was the only one wearing the "S-sign" that stated categorically that he was not Superman. John Henry Irons is not a Superman equivalent.
If there's a black Superman movie produced by WB, that will be the first-ever black Superman or black Superman equivalent. It's not been done before.