Usually for many niches, having one built out for your client can significantly improve conversion rates compared to Facebook lead form, especially if it looks professional and swanky. I recently found out about bolt.new from Samuel Darby where you can give prompts to an AI and it will build out a full on landing page (looks far better than GHL and you can get a lot out of it on the Free Plan) for you which would have otherwise cost 4 figs to pay someone to set up. This is the video I watched and it's been huge for me. https://www.youtube.com/watch?v=OE3ckqcWhS4