if you cant the bow too much will this play a role with form? it seems if i was canting too much and was causing my chest to collapse while drawing and leaning over, straight posture with a slight cant seems to work this seem correct?

I have a roughly 2:00 cant. It is natural to me. I do not crouch in my form anymore. I switched from Asbel swing draw to a mix of Terry Green double anchor from Trad Gang video and Arne Moe rotational draw. I was holding anchor for a couple of seconds early in my transition, but now I am only pausing before release. I have been shooting the same style for 36 years and only changed 2 months ago. Everybody is different, but I am shooting the best of my life and have no plans to change back. The cant comes from my bow arm and not from any body lean and I have increased my draw length over an inch from what I have shot for 3 decades. That was unexpected but has caused my previously slightly stiff arrows to be in tune and much quicker. Good luck on you your journey. I have followed many of your threads and I can tell you are really trying to get it right. Don't let the quest for perfection take the joy out of shooting. Good luck!

I believe it can affect your form, and probably does for  many... but not necessarily. I find that more radical canting makes it more challenging to keep back/neck/head alignment. Also keeping string hand parallel to the string, and yes, expansion.

More difficult, but not impossible. I practice/shoot with varying degrees, according to the shot, including some pretty steep canting in the woods & roving. I shoot most consistently when I stand "straight" = though it's actually relaxed, with a slight lean. I pay attention to how my head, neck, and string hand stay in line with the bow. At 20 yards and up, I'm more straight up. I can't more as I get closer shots. If I'm bent way over (shooting under obstructions) I notice the increased challenges.

I'm sure as I gain experience, I get better with it.
And those who already HAVE way more experience  than you or I will be along shortly to describe more.

Interesting question. Check out some pics of Howard Hill. He cants his bow but he doesn't seem to do a lot of leaning.

NO...it should NOT affect your form...OR your draw length ....IF you are shooting correctly. Good form knows not the can't angle....

Over the Pond......