Lock button & sliding action

When I use remnote on my iphone there is a lock button🔒
I think it is very useful and I want to use it on my ipad too!
but I can’t find the button (ipad air3/ safari / beta version)
Can anybody help?

  • when I do my flashcards on my ipad, I wish I could remove the “sliding action” is there a way to do that too? thx👍