Jehovah's Witnesses have NEVER knocked on my door. Nor have I ever seen them knock on anyone else's door.
I currently live about a ten to fifteen minute walk from a Kingdom Hall. I have gone past it plenty of times, whether on bus or on foot. Not once have I seen anyone go into or out of it.
For two years, I lived just two minutes walk from another Kingdom Hall, same story. Never saw a soul.
In all my time on this planet, I have never once had a JW knock on my door and try to convert me. Not that I'm complaining mind you

Can you clarify that this is something that JWs are supposed to do, or not? I could've thought that they were?
The only time I've seen them is either in our capital city Dublin, or on my local main street standing around with their pamphlets, but whenever I do see them, that's all they're doing. They're not actively engaging with anyone else. They're not being pushy (and again, I'm not complaining) in the slightest. One can walk by them and not be disturbed in the slightest.

(Seems strange to me that the stand starts off being written in Spanish, when that is a minority language. Our two official languages are Irish and English, with practically everybody speaking English, and Polish being the unofficial third most popular language, due to the wave of immigrants during the 2000s. But Spanish? Outside of school, I literally can't think of anywhere in Ireland it's spoken as a daily language)