My children (8 & 10) are very wary around dogs after years of being jumped at, pushed around, picnics raided etc since they were in their prams. I've trained them to stand still if a dog approaches them.
We had an encounter a few weeks ago where the dog bounded up to my 8yo and jumped up leaving mud over his coat, and winding him slightly. 8yo, distressed and calling out that the dog is attacking him (first the dog is much bigger and relative to his body size, second he's a child and has a child's emotional reaction), owner doesn't try to recall the dog, does the "it's a puppy" excuse and generally obnoxious and unappologetic about his out of control dog causing distress to others.
It's OK for his puppy to cause distress, but not OK for my "puppy" to react by being distressed.
Oh and we should expect it in the woods because it's a dog walking place!
Next day I was running alone in quiet countryside. Puppy bounds up and is jumpy. Owners tried to call it off as it approached, came and got it, put it on a lead and at least attempted to manage the dog's behaviour and were appologetic. Annoying, but they were trying and it is a location where the chances of encountering a non-dog walker is pretty low.
I know which dog I'd rather encounter in a year's time...
I'd like to see a campaign to improve awareness of what responsible dog ownership looks like. The legal bar on "out of control" is lower than you think and the first owner was in breech of that, second owner wasn't although if my 8yo had been there, especially after the previous day, he would have been distressed.
My retort to "It's OK he's friendly!" is "my child isn't"
I'm not sure that it's particularly worse since lockdown, we seemed to get it a lot for years anyway, but it's got better as my DCs have got older and able to manage their fears better. Training them that when they run away, the dog thinks it's tag and plays along was a long lesson. It had been a while since having incidents in close succession.
Problems with dogs may not be limited to puppies and inecperienced owners. Older dogs struggling with routine change, having less time left to themselves and disruption in veterinary care would also affect behaviour too.