I continue to be very impressed with the free version of Affinity Studio for RAW image development and photo post-processing. Powerful, polished, plentiful features, and easy to use.
I upgraded my desktop computer last month and now can use their Machine Learning tools, such as object selection in the RAW develop studio. Wow! Everything stays local to your machine and no training is done with your data.
Yes, it's not open source, but it is free and you only need an email address to register. Looks like the free version includes everything except advanced AI tools.