Critical accessibility bug on QT versions available in Bookworm

Hello,

When using QT application with Orca, there is a bug which makes app 
crash when tables are used.
For exemple, latest version of TeamTalk use there tables E.G. for the 
server list.
This bug has been fixed in both QT5 and 6.

I opened this bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081682
Unfortunately, no reply at all. It is not a security bug but it stays 
critical for accessibility with Orca.

What could be done to have this fix backported to the version of QT5 and 
why not 6 which are provided in Bookworm?

Debian testing has a right QT6 version as fare as I know. But Bookworm not.
The QT team provide patches to be ported for Linux distributions I.E. 
Debian and other but it looks it is not considered enough importent to 
be fixed in Debian as it seems, unfortunately.

Best regards,