1 - DiffusionBee is compatible with all Civitai models and all Huggingface models.
https://huggingface.co/spaces/huggingface-projects/diffusers-gallery
2 - DiffusionBee is excellent software. You can use it offline, it comes with great features. I am surprised that this software is free.
https://github.com/divamgupta/diffusionbee-stable-diffusion-ui/blob/master/DOCUMENTATION.md
3 - No! A normal Intel CPU is to slow. You need the 16 NPUs (Neural Processing Unit) inside the Apple M1 or M2. I am sorry you really have the wrong hardware.
DiffusionBee community: