Trump was reported to have 24% of the Jewish vote in 2016. Given over 100 million unsolicited mailed out ballots, another 1-6% of 2% of an electorate so concentrated in NY means little.
One possible area that the Jewish vote could help Trump if it does take a significant swing in his favor would be Pennsylvania. With the concentration of the Jewish vote on the Main Line & Montgomery County it could limit the Philadelphia regional majority for the Democrats and thus swing the entire state.
I’m not optimistic about Pennsylvania because of the ‘mail-in-voting’ wildcard. Even if it mostly works and there isn’t a high degree of vote fraud, neither side will likely accept the results and the counting will have to be stopped before December 14 leaving some votes uncounted. Nobody is going to be happy with the result except the eventual winner.