I'm curious what's the meaning of the name Irtiza. The definitions I find online are all different so what does it mean? It seems to have some Farsi or Arabic origin if so what does it mean?

The word Irtiza in Arabic is written:
Linguistically it comes from the word رضا which means to accept or be satisfied with. So linguistically your name means to accept, be satisfied with, or to choose that which you are satisfied with.

See Sura Anbiya’ verse 28, Nour 55, and Jinn 27. This word is mentioned in these verses.