!apple_enthusiast@lemmy.world is probably the largest, but there’s also !apple@lemmy.zip.

I’m not the greatest source of tech support, and I haven’t tried this for awhile, but have you tried booting into recovery mode (cmd+r on restart) and then using Terminal to disable csrutil?

If that works, you should be able to do a normal restart and have the ability to move the Siri application to trash.

!Cyberstuck@lemmy.ca exists, think this made it there too.