P: Wide gamut HDR colours are desaturated

I have encountered an instance where a wide gamut orange colour appears desaturated in HDR editing mode. I have the uploaded output PQ HDR AVIF files to https://andrewkeyanzhe.github.io/posts/Lightroom_vs_darktable/ for comparison. My website serves the uncompressed HDR AVIF files, so you should be able to see the difference on an HDR capable device and browser (e.g. Macbook Pro with XDR display with Google Chrome)

The camera used is the Panasonic Lumix S5ii

1. Version of the app - Lightroom 14.2 (Camera Raw 17.2), Lightroom mobile v. 10.3.1 71F6C8/202
2. Platform and OS version - Macbook Pro 16 M1 Pro, macOS Sequoia, iPhone 14 Pro Max, iOS 17.5.1
3. Basic steps to reproduce the problem - Download the raw file https://drive.google.com/drive/u/0/folders/1YIhkxHvp77HHTaanyFJ5LXX28jH74Rau , open in Lightroom, turn on HDR editing mode, increase the exposure by 3.4 stops so it matches https://youtu.be/0FYjApop7Mk?si=S-cXCX-0hyAvsTpp&t=23
4. Expected result and actual result - Expected: orange colour matches the original YouTube video. Actual: orange colour is desaturated