The 14.1 Beta 3 is noted to work with QB 2019.  Although full functionality is still unknown. Mac OS 14.1 Beta 3 is expected to be an official release (not beta) at the end of October, possibly sooner as there is no developer release beyond it.  

If you’re tech savvy you can also add a Ventura volume and just install QB 2019 on it.

If you haven’t updated to Sonoma yet, then hold off for now and follow the posts here to verify full functionality on Sonoma 14.1 after it’s released and people have had time to work with it.