Hello Mr. Farshtey. In MNOG there is an unnamed matoran that sells souvenirs in Po-Koro. Now, I understand that you have stated that MNOG is not the standard for canon, but to your knowledge is there a name for this Po-Matoran?
May I suggest making him this character? https://biosector01.com/wiki/Pekka
He's a carpenter.
If he isn't named in the game, then he has no official (or unofficial) name.