Amusingly, I also just realized that even the operating system is spoofed here! I'm on macOS 14, yet the user agent claims "Mac OS X" 10.15. It's a pretty funny situation, and clearly for the sole benefit of very old websites and libraries performing dubious checks.
I don't know if they still do it, but the Apple Silicon Macs also lied about their architecture and said they're Intel. Truth is not the guiding principle of the User-Agent (or all the JS navigator properties, or anything else easy to use to check this kind of thing).