I experienced tether issues with both Canon and Leica on my Macbook Pro 16 inch Intel based, with the latest updates and necessary plugins. After speaking to these Adobe reps through chat and even remote access, no solution was found (but still claiming they are experienced in Lightroom/Photoshop etc.).
In other forums I found some workarounds by downgrading macOS, which I did. Started from the OS which came with the Macbook, updated it to Ventura 13.7.4 (the oldest OS Lightroom accepts). After that I installed the Creative Cloud and through that Lightroom Classic v14.1.1. With this combination I'm able to tether again with the Canon EOS R6MK2. So this might be a solution for the ones with similar problems.
If Adobe is reading this: fix your software. We are paying a lot money and for some this is a key feature that just must work. If I'm able to do this, what does it say about your support? For once put your pride aside, talk with Apple and give other brands also native use for tethering instead of some plugin. Don't forget that, even it will be a pain, work flows can be changed, meaning changing to other software that can tether well enough.
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