The boat owner controls the height of the bimini, when they contract to have it made and the bows are installed. This canvas does have to "ramp down" to the rear of the dodger when that opening is closed off for rain/spray when the boat is in the slip or under power on a wet day. That's a separate long rectangular piece with a zipper on each side.
The boom is typically going to end before the bimini begins. On some boats the designer does let the the connecting panel get too close to the end of the boom, IMO.
If starting from zero, do be damned sure that the boom, when sailing and with the backstay fully tensioned, is still at least a couple inches above the dodger. I learned a
very expensive lesson regarding this, dealing with a builder with little sailboat knowledge.
Designing cockpit canvas enclosures is quite an art, and done right, can be a masterpiece.
Have a look at the photos in this guys web site:
https://www.iversonsdesign.com/itop_photos.html
(20-20 hindsight: I should have probably gone with Jason's company.)