Take a trip down memory lane and edit some clips and photos from the past 10 years? Also ring around family and compile some messages seeing as you can’t visit anyone.
Edit them to replace her with someone else?
What about a photo album, find pictures from the last 10 years, get them printed and stick them in an album.
We go away for our anniversary so i did this after around 6 years with the intention for us to put photos from each holiday into the album. You can get photos printed that look like polaroids which look quite decent.