Custom page render Markdown

Hi guys!
I have an issue of rendering a markdown text on a custom page which is in the end a Cluster.
Any solution?
I've tried via:

{!! str($markdownContent)->markdown()->sanitizeHtml() !!}

{!! str($markdownContent)->markdown()->sanitizeHtml() !!}

but nothing works at it should format the markdown.

Custom page render Markdown - Filament