Often those original silent film score often were rather local and Meisel’s was primarily for the German premiere. I doubt it was regulary peformed or even outside Germany.
Yes, I also don’t know of many other performances of BATTLESHIP POTEMKIN with the original Meisel music at the time. Of course, it has received lots of scores since then, ranging from Michael Nyman to Pet Shop Boys to Eric Allaman. And most physical releases have the excerpts from the various Shostakovich symphonies.
But OCTOBER was different, it seems. I had to double check on Wiki, as I wasn’t aware that Meisel had written the original for this too. I always thought it was an original Shostakovich score from the get-go. As it turns out, it WAS a new original score (and not like the BATTLESHIP situation), but written many years later, in 1966. And later turned into a tone poem, which is where I first heard it – I think on one of my dad’s classical records.