Yes, difficult to say. My guess would be the start of BBA.pics need to be higher resolution. Can't see anything really.
I noticed the same "eggs" on some of my wood today which is up high close to the light, yes its BBA! get the h2o2 out!
Definitely could be, that was my other thought.In my opinion it is some type of fungus growing from nutrients trapped in the wood.
I've had similar on wood, also soft water. They look like wee tiny black warts and just rub off. I left them. Did no harm as far as I could tell, just made the tank look a nit more au natural.