Imaan has three levelsThat mentality is silly, the hibaaj is a command from Allah SWT regardless and what stops a person from sinning isn't the hijaab but rather the piety in their heart, a non hijaabi can be a thousand more times closer to Allah SWT than that hijaabi because the truth is, we don't know what good/khair that non hijaabi does behind closed doors and we don't know how many sins that hijaab commits behind closed door. I know many non hijaabi's who are respectable girls that have beautiful character and are better than me in many ways wallahi
Belief in the heart
Spoken by the tongue
Then acted upon the limbs