Nobody has it on, and unless BOTH sides are using it, your iMessage conversations are all readable by Apple, because they are backed up twice - one for each end

Nobody has it on, and unless BOTH sides are using it, your iMessage conversations are all readable by Apple, because they are backed up twice - one for each end. This option is also disabled in the UK - an intentionally preserved backdoor for government access. https://support.apple.com/en-gb/122234 https://support.apple.com/en-gb/122234