If you are talking about sending information from LWC to Omniscript you can add something like this in your code after retrieving the data from api -

this.this.omniUpdateDataJson({ "price" : "$9821.6", "symbol" : "BTC" });

Now when you do a preview of Omniscript, you will be able to see on the right hand side (where all the variables are printed out) 2 more fields of price and symbol being displayed there.