Not at all. You’re doing everything correctly.
Yes! You can see it if you look closely. The camera from this machine shows a mirrored image. Therefore, the tags are not being detected.
We found out about this the other day and are looking for the reason first, to come up with a proper solution. (mirroring the image in LightBurn would be the most obvious thing to do, but it’s not quite that simple.)
For now, there’s this silly, but functioning workaround:
Print a pre-flipped AprilTags card. I’ll send you one!
May I ask which OS you are using?
Can you send us a screenshot of the camera image in the Windows Photos app or MacOS PhotoBooth?
Edit:
I forgot the important part: