The maximum fine for such a breach is 4% of the company's global revenue.
Microsoft, in 2021, turned over $168Bn. Google turned over $181.69Bn. Amazon turned over a staggering $457.96.
Between them they had a combined turnover of $807.65Bn, making them liable for a fine of up to $32.3Bn per year (assuming revenue is flat and they all get hit for the maximum penalty and don't do any kind of damage limitation).
The EU general budget in 2019 was only €148.2Bn. So such a fine would actually cover nearly 20% of the running cost of a 27 member multilateral trading entity with a population larger than the United States.