NFCTagReaderSession on iOS unable to detect nor format blank ICODE SLIX tags

Hi all,
While trying to format blank ICODE SLIX or SLIX2 tags with my iOS swift own app, I cannot manage to have NFCTagReaderSession detect the tag.
The NXP's "NFC TagInfo" App does detect the empty, factory blank, tag but my app fails

Even the Apple's NFCFishTag demo app of WWDC 2020 fails to detect the blank tags

My app displays the standard iOS NFC scanning panel but that's all it can do ... it keeps waiting to sense a tag, before timing out.

AFAIK I properly set the entitlements (with both NDEF and TAG formats specified) and info.plist (with scan usage description string) files
I have spent countless hours on Internet without success
Any helps is much appreciated
NFCTagReaderSession on iOS unable to detect nor format blank ICODE SLIX tags
 
 
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