Other than the ones already mentioned I'd like to throw in a wild Sifu in that hat. It uses the same concept of a "posture" you break by combining attacks and well-timed blocks. Its campaign is fairly short, but it's a game made around replaying and perfecting your skills in it, to the point that mastering the "deflection" mechanic to a decent degree locks the true ending. It also includes an arena mode with multiple challenges to get through in it.

As far as ER goes, is just a different kind of beast. I think you might enjoy it all the same, but things may feel a bit sloppier or less attuned to whatever build you choose to play with, compared to how perfectly attuned to Sekiro's sword combat most things are in Sekiro. I'd still greatly recommend it, just not as a nice little replacement for Sekiro as it's not quite the same. And no, unfortunately you can't depend on "deflects" for Elden Ring. There's a certain thing now in the DLC that gives you something similar, but is not the same and is way deep into the game for me to just argue you should go get it and play the game with it.