No wedding gifts? Is that a thing?

My husband and I have been together for 9 years and have two amazing children. We didn’t have the money years ago for a wedding but we do now and our eldest daughter (5) had been asking why we weren’t married and she wished we were, etc. so we got married!
We had a small wedding of 50 guests, 45 of those guests from my husband’s family and a few close friends.
We did NOT have an engagement party, NO bachelor/ bachelorette parties, NO bridal party/ NO groomsmen. Our venue was local (within an hour) of everyone’s home. No out of town guests traveled to our wedding. My husband and I paid for everything. We paid for my parents hotel room and his parents hotel room for the night of the wedding in hopes that one or both of them would be able to babysit our two kiddos, and yes, both sets of grandparents offered to babysit overnight at the hotel. My parents ended up with our kids because the kids chose them.
I said ALL of that to say this, what’s up with the zero contributions from in-laws towards the wedding, not bringing a gift, not even a dollar tree card with well wishes?! I absolutely know their financial situation and yes, they can afford a card and a $100 bill for their son’s wedding. I’m a CPA and have been doing their taxes for 8 years. I know exactly how much money they have. They are well off. His only brother didn’t give us anything either, not a card, not an F you, nada. His mother is “miss manners” proper etiquette is very important to her so I’m surprised that she didn’t at least give us a card. Interestingly, the only gifts we received were from the few friends and family I was able to invite after my husband insisted that we invite his entire family.My parents ended up contributing several thousand dollars towards our reception and insisted upon paying for their hotel room. That was their gift, and we’re incredibly grateful for their generous support. We received cash in a card from my family and friends and again we are incredibly grateful for their generous gifts.I know that there’s no way to discuss this topic without sounding like an entitled jerk and I’m not really dwelling on it but I am curious if this is normal? Is it common for the groom’s parents to not at least acknowledge the son’s marriage with a card? Is it a sign that the family doesn’t accept me? I understand wedding gifts are not mandatory but they are customary where we’re from (the greater Los Angeles area). My husband’s cousin got married within the first year we were dating and I recall his mother insisting we purchase this really expensive knife set for them from Williams Sonoma that was way out of our budget so she does give wedding gifts. I could never show up to a wedding empty handed. I’m trying to understand the psychology of in-laws (parents, siblings, close relatives) not giving a gift?
We also had 5 of his adult cousins show up that weren’t invited (again, sans gift/ card) and 4 guests (two sets of his aunts & uncles) not show up without explanation that replied with a Yes RSVP and their dinner protein option. Days later after we reached out to each of them to see if they were okay, they replied as if they just skipped an impromptu brunch at our house. Like no big deal. Wtf?! TL;DR what’s up with my husband’s entire family not bringing one gift or card or contributing in any way to our wedding? Is this normal for 45 guests from his family to all not give at least a card with well wishes?