So I see it’s suspected (for days and a year) already that the miraculous find in Jordan is a forgery after all. I found a quoted letter by Peter Thonemann:
The text was incised by someone who did not know the Greek language, since he does not distinguish between the letters lambda and alpha: both are simply represented, in each of the texts, by the shape Λ.
The text literally means ‘without grief, farewell! Abgar also known as Eision’. This text, in isolation, is meaningless.
The longer text from which it derives is a perfectly ordinary tombstone from Madaba in Jordan which happens to have been on display in the Amman museum for the past fifty years or so. The text on your bronze tablet is repeated, in part, in three different places, meaningless in each case.
Didn’t take much to make news out of it though, eh?