Thanks for this information
I would have shot them in 40 Mpx as the lighting conditions seem to be very good and you can much more detailed (nonetheless those ones are quite detailed in 10 Mpx and it is amazing!).
As well as the rear facing camera, you can use the full resolution of 108 Mpx to have much more detailed shot and have a 3x lossless zoom in scene where lightning conditions are good and no much HDR capabilities are needed.
Enjoy your new Galaxy S21 Ultra 5G's camera features!
See you soon!