were there ever any more besides "Christmas party" (the one where Jackie also played Joe the bartender, Fenwick Babbit, the poor soul, Reginald Van Gleason and Rudy the repairman) and the one where Ralph and Ed take jobs as a street-corner Santa and an elf for Christmas, but unbeknownest to them they're actually the front for a bookie joint.
I know "the classic 39" had a Christmas episode.

There were some other ones.

"Honeymooners XMas Special" that aired in 1978
"Honeymooners XMas Carol" that aired in 1977.

There were other episodes like "Songwriters" that in which aired around Christmas and there was a Christmas reference or two.