I live in a small town west of Austin. I’ve never seen a Biden yard sign in front of a residence. This is strange. At a minimum it could mean “no enthusiasm” and a stay at home voter on election day.
Another point you listed I can relate to is I don’t put signs in my yard because I’m not interested in having my property vandalized or “punked” as the Democratic Party has now sunk low enough to do.
Austin is the epicenter for Marxist proggies. That’s interesting.
I will say this. A Biden sign is safer in non-Austin Texas than a Trump poster/sticker in California.