Apologies if I’m missing something.
I’m finding there seems to be a fair bit of precedent in published literature to display alternating time signatures without any separator:
At present, I can achieve this only by going into the Music Symbols editor, finding the time signature “+” glyph, and deleting it.
I’d like to request an option to change the separator for alternating time signatures via the properties panel, as is currently possible with interchangeable time signatures.