According to the German professional media "AMuS", Red Bull stated that if F1 does not take measures to freeze engine development after 2022, they are considering exiting F1. This report said that after Honda's decision to withdraw from F1, Red Bull hopes to take over Honda's engine manufacturing and production. This means that both Red Bull teams will compete without an engine supplier. Considering the estrangement between Red Bull and Renault in the past and Mercedes’ reluctance to provide engines, this may have become the most logical choice for Red Bull.
But if Red Bull breaks away from Honda's support and takes on the manufacturing and production of the engine alone, they need the stability of the F1 engine rules in order to maintain their competitiveness. According to the report, the two Red Bull teams requested to freeze engine development from 2022, otherwise they would consider exiting F1.
Red Bull’s Dr. Marco, who is in charge of the F1 project, confirmed that Red Bull prefers to carry the engine production and manufacturing by itself. This is the only way to maintain independence, but Red Bull also hopes to make F1 managers aware of this.
reported that this plan does sound very dramatic: "In 2022, either Red Bull will leave or engine development will be frozen." The report pointed out that Mercedes has a positive attitude towards Red Bull's plan, and Renault is also willing to support this proposal if certain conditions are met. But Ferrari's attitude is variable. The report said, “Ferrari does not believe that Red Bull is in a critical state, and they seem to be willing to provide engines to the two teams.”
According to the current engine rules, the biggest change facing 2022 is that the use of biofuel will account for 20%; starting from 2023, F1 engines will completely use carbon-neutral fuel.