Indeed price signaling [1] is a real thing when it comes to anti-competitive behavior among dominant market players - and government economists love analyzing these types of problems for antitrust cases, as they can be like solving forensic puzzles. [2]

[1] https://en.wikipedia.org/wiki/Price_signal#:~:text=A%20price....

[2] https://www.thesoulofenterprise.com/tsoe/antitrust