The attached crash report is from a mid-2011 27" iMac with the stock HD6970 graphics card, also running Monterey 12.0B6 with the latest OCLP_v025n.
Don't really understand the report because it's too much info ?
All patchers only bring back OpenGL functionality while it is impossible to write a metal library for these old cards. Apps based on this metal API will either show glitches, missing functionality or just crash and there is nothing, really nothing we can do about this. Home, Maps, Photos are Apple apps known to get more and more metal based functionality.
If you cannot change the GPU with a more recent metal capable model (iMacs and MacPro) the great update my old Mac story may end here sooner or later.
Same applies to WiFi/BT and other hardware. While a patcher may bring back basic functionality you will never get the latest and greatest like AirDrop, HandOff, Continuity, SideCar, Universal Control because these features depend on the existence of some real hardware which cannot be just patched magically into your old system.
Your iMac12,2 in particular can be upgraded with a metal GPU and a BCM94360CD WiFi/BT combo card and will become completely compatible with Big Sur, Monterey and most likely with all/most current apps.