Its being maintained on the telegram group.
Afaik, it was open source until some dude started to share it as being its own and not giving the credits to the real dev.
Under what license? Most of the standard licenses require you to keep a notice of who the original author is. Becoming another open-source-gone-proprietary author is no way to reepond
i had problems with tmobile mms for a while and it was the cloudflare dns changer magisk module. with it off everything went through the first time. even though i could set my dns via network settings back to cloudflare and mms worked fine
It definitely exists. Search for it on Telegram itself. It's called "Renovate ICE - OnePlus 8/T/Pro series".