While not a mainstream title, the "BangBang" phrasing is occasionally found in:
The phrase "izzy bizzy bangbang 2021" appears to be a niche or colloquial term, possibly referring to a social media personality, a specific debut in a digital medium, or a unique phrase used within a specific online community during that year.
: 2021 was a peak year for creators diversifying their income through various digital solutions and social media debuts. 3. Usage in Media and Gaming