It's absolutely their right, but it's a dramatic cultural departure from the history of the company.

In the late 2010s/pre-covid it was very common for employees to port their personal cell phone number to their work phone and just not have a personal cell phone. The internal culture at the company was remarkably open for their size.

That all went away by the time I left in 2022, and from what I've heard it has only accelerated into an employee-hostile environment. I'm not shocked at this move.