There is even a seventh symphony extant: the Symphony in B flat minor, written in the 1880s, performed a few times, but then withdrawn. The composer did not destroy the score, so there is an opportunity to revive the work. If that will happen the future will show.
Another yet unrecorded orchestral work by Woyrsch is his Violin Concerto "Scaldic Rhapsody":
https://www.albismusic.de/notenshop/solokonzerte/violinkonzert-op.50/A few weeks ago a CD with Woyrsch's complete organ music was released. There are a Passacaglia on Dies Irae, and eleven Chorale Preludes. I think that these are great works, but the interpretation of the organist sounds a bit tensionless to me.
https://www.jpc.de/jpcng/classic/detail/-/art/felix-woyrsch-complete-organ-music/hnum/10670395