Ok, 9mm and 338 lapua are hugely different applications. Take it from a guy that's been down this road - instead of trying to find a one-and-done-whizzbang-doeveycartridgeunderthesun can - get yourself a suppressor that fits a specific need. My first can was supposed ti be a catch all, I now own 6, and rarely use my first purchase.
I highly recommend a good 22 can. Highest value for your buck, so much fun. CCI standard velocity is my favorite ammo for 22. It's subsonic, cheap, runs great in everything, and accurate.
For rifle cans - highly recommend thunderbeast. They're quiet, lightweight, and a great company.
There's a million great options for a 9mm can. Get one that won't feel like hanging a brick off the end of a pistol or smaller platform.
Good luck with your choices. Your first suppressor will turn you into a tax stamp collector.