Examining the context in the script of The Phantom Menace makes things a little more clear:
DARTH MAUL : Tatooine is sparsely populated. If the trace was correct,
I will find them quickly, Master.
DARTH SIDIOUS : Move against the Jedi first…you will then have no
difficulty taking the Queen back to Naboo, where she will sign the
DARTH MAUL : At last we will reveal ourselves to the Jedi. At last we
will have revenge.
DARTH SIDIOUS : You have been well trained, my young apprentice, they
will be no match for you. It is too late for them to stop us now.
Everything is going as planned. The Republic will soon be in my
Darth Maul is saying this directly after Sidious has told him to move against the Jedi, suggesting that he sees this as revealing themselves to the Jedi. It’s more the revelation of the Sith as a whole, rather than the specific revelation of Sidious’s existence, that Maul intends. And indeed, after fighting Maul the Jedi do realize that the Sith are active once more.