Can't get Audacity follows Qjackctl [PLAY] button

I use Audacity 3.5.1 with Ubuntu Studio 22.04.4 LTS (64 bit Linux) and Jack Audio Connection Kit through Qjackctl 0.9.6.

It is expected that Audacity starts to play/record something when we press the Qjackctl [PLAY] button, but… It isn’t my case.

Can somebody teach me how to get this behaviour, please? ???

That behaviour is based on “Jack Transport”.
Audacity does not currently support Jack Transport.

(I logged a feature request for this a couple of years ago, but no progress on this to date.)