I also understand the pain of no more children.
I have my dd, but due to a rare condition was advised that to have another pregnancy would risk mine and the baby's life and leaving dd motherless. So different circumstances but same-ish result.
It isn't anywhere near as painful now as when I was at your stage, where I felt a physical emptiness in my gut, couldn't eat, sleep, think beyond what I had to do.
It was also painful for my then husband which I didn't fully appreciate until I had counselling from MA (miscarriage association) Who I definitely recommend.
He was extremely reluctant to dtd for a good few months after, partly worrying about physically hurting me (I'd had to have a few surgeries), partly not wanting to pressure me, partly fear of me becoming pregnant (I was on medication that could cause baby to have deformities). Very difficult.
It won't always hurt like it does now. Hard to explain, Foreseeable triggers like dates have become for me less painful and more a source of reflection.
I light a candle for baby loss awareness, I have a star on my Christmas tree which Is from MA and means my babies are part of Christmas.
Other friends and family have done other things to help them cope/mark the loss. From planting trees/flowers, balloon release (controversial) to raising money for/giving donations to charities associated with mc/baby loss/children generally.
Some people have their scan photos in frames, some can't bear to keep them.
And some people don't like to do any of this, everyone is different and whatever you do is right for you.