5.5-5.5 Coherent Breathwork 10 min Too Much to Ask For??

While I love the breathwork options, I hate that the coherent is only a single set option. I hope they expand it into allowing us to set the times and duration for a session. Is custom too much to ask for or at least the most standard 5.5-5.5. I can't do holds or even 6-6 is pushing it for my tolerance right now. I'm in nervous system collapse recovery, and I'm slowly working on HRV improvement and healing my ANS. Anyone have other tips for these goals?