There are UNO’s in the Parts - you can search for them (they are boards with stuff on them).
I made my own UNO PCB - I did not include holes as I don’t often use the standard UNO holes. When holes are needed, I use the “Hole” part and place them where needed.
Attached is graphic and files… You can use it/Hack it…
UNO_R3_pcb.fzz (1.5 KB)
The inkscape file - delete the fzz extension
uno_boardp.svg.fzz (1.6 KB)