JSFiddle - React, Tailwind, and code Playground

JavaScript

const a = [{
    "name": "sondre",
    "uq_id": "abc1"
  }, {
    "name": "sofie",
    "uq_id": "abc2"
  }, {
    "name": "casper",
    "uq_id": "abc3"
  }, {
    "name": "odin",
    "uq_id": "abc4"
  }];

  const b = [{
    "name": "sondre",
    "uq_id": "abc1"
  }, {
    "name": "odin",
    "uq_id": "abc4"
  }];

  const c = [{
    "name": "casper",
    "uq_id": "abc3"
  }];
  console.log(a);
  console.log(b);
  console.log(c);
  console.log("Starter");

  sort(a, b, c);



  function sort(a, b, c) {
    result = [];
    console.log(result);
    if (b !== null) {
      result = a.filter(function(item) {
        return !b.includes(item.uq_id);
      })
    }
    if (c !== null) {
      result = result.filter(function(item) {
        return !c.includes(item.uq_id);
      })
    }
    console.log(result);
  }