lf search
won’t see T5577,
lf T5 detect
should give you a result
Then try writing to it with indala or HID commands
I am away from my proxmarks, but something similar to
lf indala read
and the result should have raw data
then put you amazon T5577 tags on the LF antenna.
lf indala clone -r ××××××××××××××××
where ×××××××××××××××× will be the RAW read result from above
I believe the Keysy tags are proprietary to the Keysy writer, (Which is unfortunate for us, but its his decision) anyway, I dont see any reason why you cant “see” them if you run a
lf T5 detect
but I dont think you will be able to write to them.