Hi @williamews, thanks for your question.
We are aware that some customers would like to customize their block pages. Each request for a feature gets noted internally to help us prioritize, but we can never guarantee here on the forums when it may be added to the plugin or what a potential timescale may be.
You can currently add custom text in Wordfence > All Options > Brute Force Protection > Additional Options > Custom text shown on block pages if you need to explain anything specific to your legitimate site visitors who may have become blocked at some point.
Whilst we aren’t able to provide support for custom code, or guarantee that it won’t be affected/overwritten by future plugin updates, you can modify files if you’re comfortable doing so.
Thanks,
Peter.
