Do pgn files contain annotation symbols?

Hi all,
I wish to create some statistics of my games in R (particularly of my blunders). I exported and downloaded all my games as a pgn file. I checked PGN tags, Move times & Evaluation before exporting the file.

In the sample here on database.lichess.org/ I can see that some moves contain annotation symbols (e.g. ?? or ?!). Like this:

10. Bg5?! { [%eval -0.44] [%clk 0:00:18] } 10... Qc7 { [%eval -0.12] [%clk 0:00:23] }
11. Nbd2?? { [%eval -3.15] [%clk 0:00:14] } 11... h6 { [%eval -2.99] [%clk 0:00:23] }

In all the pgn files I downloaded (my own but also the public lichess databases) those annotation symbols are missing. They would be helpful to detect blunders. How do I get those annotation symbols in my pgn file?

For your most recent game with available analysis: lichess.org/game/export/xEgq902X?literate=1
Where 'xEgq902X' is the game identifier (also in the URL).

Don't know how to pull it from the database, however, never used it.

You could easily write a script to do it since the evals are there. It's a simple subtraction.