Links/pointers? I know only of Achronix' original Speedster series, which was alas abandoned for a conventional architecture ("Power" was the reason I was told).
Morphle Logic https://github.com/fiberhood/MorphleLogic/blob/main/README_M...
https://core.ac.uk/download/pdf/276277602.pdf
With Google scholar you can search for 'asynchronous programmable logic'
For example asynchronous logic with standard FPGA's
https://www.researchgate.net/profile/Jerome-Quartana/publica...