Check this thread out. First post goes through that.
You can just enable/disable parameters as you see fit.
If your Retroarch doesn’t have twitch enabled, sounds like you’re using a very old version of the OS, in which case an update might be a good thing. I think os 0.5 had it by default.
Otherwise, my image has the latest version of Retroarch installed. Here’s a link: Custom D.E.O.T. V2.0+/Clockwork OS v0.5 image - With customised DEOT interface, Kernel 5.7, Optional 1400MHz OC, Debian 10 Buster, Retroarch 1.9.0, Mupen64+ plus more! (Current build: 200903)