Javascript-why some browsers cannot recognize the QR code images added to the mobile page?

I made a mobile page and put a QR code image, but some mobile phones or some browsers do not have the recognition function. Some long-pressed prompts that the download is required, but the mobile phone clearly has the latest version. Is it a permission issue? Now we want to implement the long-pressed QR code recognition... we made a mobile page and put a QR code picture, but some mobile phones or some browsers do not have the recognition function.
Some long-pressed prompts that the download is required, but the mobile phone clearly has the latest version. Is it a permission issue?
How can we break through the long-pressed QR code recognition function?

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I made a mobile page and put a QR code image, but some mobile phones or some browsers do not have the recognition function.
Some long-pressed prompts that the download is required, but the mobile phone clearly has the latest version. Is it a permission issue?
How can we break through the long-pressed QR code recognition function?

Isn't long-pressed QR code a built-in function of the mobile phone? None of the IP addresses.

Long press to identify the QR code. I used to do this only when I opened the webpage.