I’m pretty sure I read on here, it may be hard to read (or feel) right after install… Also may depend on the reader. Some readers work better than others with these small tags. What tag did you get and what readers did you try?
I’m a noob, but the general consensus of stuff I read is be patient, and don’t play with it. Let it settle.
If you haven’t, read the FAQ too… X-Series Implantable Transponder FAQ