It was interesting to see that a contact on 1296 MHz was made between EA5TT in Spain and SV8CS in Greece on the 2nd of January 2022. The distance was around 1850kms.
While this is well short of the 2714km IARU Region 1 record between Ireland and the Canary Islands set back in July 2020, it is still an impressive distance for the 23cms microwave band.
Manolo, EA5TT reports working SV8CS on 1296.174 MHz on FT8 after working him on 144 MHz and 432 MHz earlier. EA5TT was using just 10 watts with a 35-element Yagi antenna.
As for the mode of propagation, it looks like it was a tropo duct over the Mediterranean Sea. This is the tropo forecast from Pascal, F5LEN...
I'm not sure what the record is for tropo in the Mediterranean but it looks like there is a 3300km sea path between the SW of Spain and Israel. Is it possible on 23cms?