test> db.foo.find().sort("hello").explain()
{
  queryPlanner: {
    Plan: {
      'Node Type': 'Sort',
      'Parallel Aware': false,
      'Startup Cost': 97.78,
      'Plan Width': 64,
      Plans: [
        {
          'Parent Relationship': 'Outer',
          'Parallel Aware': false,
          'Async Capable': false,
          Schema: 'test',
          Alias: 'foo_a9f37ed7',
          Output: [ '_jsonb', "(_jsonb -> 'hello'::text)" ],
          'Node Type': 'Seq Scan',
          'Startup Cost': 0,
          'Total Cost': 27,
          'Plan Rows': 1360,
          'Plan Width': 64,
          'Relation Name': 'foo_a9f37ed7'
        }
      ],
      'Async Capable': false,
      'Total Cost': 101.18,
      'Plan Rows': 1360,
      Output: [ '_jsonb', "((_jsonb -> 'hello'::text))" ],
      'Sort Key': [ "((foo_a9f37ed7._jsonb -> 'hello'::text))" ]
    }
  },
  explainVersion: '1',
  command: { find: 'foo', filter: {}, sort: { hello: 1 }, '$db': 'test' },
  pushdown: false,
  sortingPushdown: true,
  serverInfo: {
    host: 'ferretdb',
    version: '6.0.42',
    gitVersion: 'bc504ad73fbe30deb7096cc82d76f6ba8370cbaa',
    ferretdbVersion: 'v1.0.0-95-gbc504ad7-dirty'
  },
  ok: 1
}