There exist all sorts of binoculars, astronomy binoculars, and even binocular telescopes, priced low to high. They can even become quite large, such as the ones offered by TEC:
https://www.telescopengineering.com/tel ... elescopes/
or by APM:
https://skygazeoptics.com/products/apm- ... gJbYfD_BwE
https://www.bhphotovideo.com/c/product/ ... gK-lfD_BwE
And there are even some binocular Dobsonians!
But I haven't seen or heard of even one Cassegrain-type binocular telescope,whether
p.s. Is it all about central obstruction issues at low powers? But high power use would still be ok, right? Hmm. Maybe alignment becomes too difficult then... But still, none ever?