I have AppClip set up in AppStoreConnect and it is activated when read by NFC.
After trying several times, sometimes the AppClip card does not show up. (I don't think it's a communication speed issue as it doesn't show up after some time).
As for the cards, we are only aware of the AppStroeConnect settings. I tried changing the image file of the card to one with a reduced size, but that did not completely resolve the issue.
If you have anything to investigate to resolve the issue, I would appreciate it if you could let me know.