Darktable has a "neural restore" algorithm [0] in the development version (intended for midsummer release). Note:

- It appears to be an out-of-band pre-processing stage (run the image through denoise to produce an intermediary TIFF), unlike most other parts of the program.

- All AI features are gated behind compile-time flags which default to off.

[0] https://github.com/darktable-org/darktable/pull/20523