"didn't work, does it work on your end?"
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No. I am not having this issue. I'm saying, "Hey Siri! Find [my song] in my music library, and play it." Spotlight Search ought to make it be located. You might be saying the incorrect words here. I remember an Apple Support Rep telling me on a call a few months back, while troubleshooting a iOS26 update install, that iOS27 and macOS 27 are purely AI-based (which is a technology of its own that is still in beta status, as far as I'm concerned). So, report this as a bug, in the meantime.
Report this to Apple:
Do your Part: Inform Apple of your feedback of this issue. Include how you’ve troubleshot this, and your results. Apple wont get back to you directly, but the more feedback they receive from its users, the more likely they will know what needs to be fixed, and what their customers prefer in updates, and future macOS versions to come. Apple with know nothing of this occurrence, if you don't report it to them.
- Go Here: Feedback - macOS - Apple
- Select: "Bug Report" for the "Feedback Type"
- Select: "Software/Firmware Update" for the "Feedback Area"
- Proceed from there as necessary