Byzantine coin need to be identified please

Hi everyone, this coin is similar to this one, but it's not, and as far as I can tell, it's not in Numista
https://en.numista.com/catalogue/pieces61498.html
it's 19 mm weight 4.5 Grams
Thanks in advance

I don't recognize your coin and am not an expert on Byzantine coins, but can offer that in general a good place to look for matches for Byzantine coins is

http://www.wildwinds.com/coins/sb/i.html

The XX might indicate a denomination of 20 nummi, though this is more commonly indicated by K, a half follis (a follis is 40 nummi).

Thank you! I'll certainly try to find it there

Hello. You've probably found it already, but I'd tentatively suggest Constans II and Carthage mint, somewhere around SBCV1062.