Usually they are.
Well, the Bible passages being used at least, are in the missals usually.
I imagine at protestant services they don’t read the entire Bible each time, bud certain passages.
We do a similar thing, but instead of making you search in the Bible, the passages are all right there.
The liturgy is literally made from passages in the Bible essentially.
If there are not missals, then you simply listen to the reader reading the Bible.
Most people couldn’t read until hundreds of years ago, so hearing the Bible is how they learned from it.