Since 2019, the Office of the Information Commissioner has the ability to make orders. It can also issue subpoenas to federal institutions and force them to release documents. I can say that, up to now, I've had the necessary tools.
That being said, my office still needs to have enough staff to handle incoming complaints. Assigning files is difficult because we receive more than we're able to take on. Once the files are assigned, the investigations go fairly well. The office's authorities are properly used and respected, generally.