You know better than I - can I ask what RCS is doing that leads Google to disable it on devices with unlocked bootloaders? Are devices meant to only accept mess

You know better than I - can I ask what RCS is doing that leads Google to disable it on devices with unlocked bootloaders? Are devices meant to only accept messages that have been signed by a vendor or something? I thought it was just a new messaging standard but I guess there's a lot that goes into the security of it. But why can Signal run e2ee messages on unsavory devices but googles won't let me send a text message unless they've signed the whole stack?