Hi funchess,
Thank you for reaching out. This is a great observation and a completely understandable expectation, especially coming from Lightroom Classic, where the Loupe Info Overlay (cycling with the I key) is such a natural part of the workflow.
Unfortunately, Lightroom for Mac (the cloud-based version) does not currently include a Loupe Info Overlay feature. The I key in Lightroom opens the Info panel on the right side, but there's no option to display file attributes directly overlaid on the image in Loupe or full-screen view.
Your current option is to use the Info panel (I key), which shows metadata in the side panel and works in full screen, though it does take up some screen space.
We appreciate you taking the time to share this.
Best regards,
Anshul Saini