Recently I passed through a wealthy suburb and saw very few yard signs. Those I did see were for local races only, not presidential. Did see maybe four Biden signs but that was it. No Trump signs. Peculiar.
In my local travels, one of the largest and most expensive homes has a giant "Biden/Harris" sign on their acreage.
About a dozen more modest homes have "Trump/Pence" signs on their front lawns.
Of course, most homes do not have any political candidate signage, or any other markers to indicate a preference. That seems prudent to me.