now that ghost mode and sniper assassin is offline is there any way to get those?
Unfortunately, you miss the window where those achievements can be completed. The multiplayer mode is unlikely to return, you can’t unlock them anymore. Sorry.
These likely do not carry over to Hitman 3 so that’s a plus
Actually IO announced in August 2020 that there will be a way to unlock multiplayer trophies in Hitman 3 «in the coming months»:
From the same announcement by IO regarding the Phantom Suit:
So you will be able to get the suit (but probably not the trophy).