US ice cream makers say they'll stop using artificial dyes by 2028
apnews.com
apnews.com
The story also links to three other big food manufacturers who are phasing out these dyes... over multi-year periods.
As for what flavor would warrant dyes? Off the top of my head: Mint, peppermint, strawberry, orange sherbert, blue moon... I'm sure there's more.
Superman flavor is the answer.
So they can wait for US regime change and not do it