It’s called Cumulative Layout Shift (CLS). A respectable website would monitor this before and after making changes but most don’t and of course there are some which know that they benefit from it happening.

https://web.dev/articles/cls

The only smart locks I’ve seen are expensive and can be defeated using simple methods.

I believe there was an attachment for the bottom that had a LAN port.

“Content not viewable in your region”