I ride a few weird bikes, and have noticed a significant difference in passing space granted by vehicles, which correlates with the unusualness of the bike.
So a normal dropbar road bike or flatbar MTB gets a certain amount of passing space. Cars will veer around me on the very narrow roads, but not a lot. They're also more likely to push past if there's oncoming traffic on the other side of the road.
If I were riding my tandem, or my recumbent, or towing my little kiddy trailer then that passing space is much bigger. I've had full size B-trains go completely on the other side of the road to go around me, whereas other days they've given me half that space.
My theory is that a cyclist is just a thing, and the driver's mental "processing stack" never raises that above the "reptile brain" into conscious thought.
When that same driver sees something new and odd, the thought ascends through the brain layers and hits the conscious brain, and that causes the driver to consciously give a goodly amount of space.
So, rather than looking unsafe, look different.