i believe the co-mingling of finances and stuff is more asked for during the removal of conditions process.
including it as part of AOS isn't required, but some people do as just extra evidence of a bona-fide relationship.
I included a photos from our wedding, a copy of our joint apartment lease, print outs showing my husband as a dependent on health insurance (medical, vision, and dental), and a print out of my life insurance (2 different ones, both employer provided) showing him as the sole recipient.
but none of that is required, the only thing required to show your marriage is real is the certified copy of the marriage license.