The workaround I would try is I'll create a simple website on sites like Wordpress/Wix/SquareSpace/etc. Just a free one, no need to make a premium account. Then. I'll place a button there that sends the visitor to where I really want to send them. I'll make this site look decent, at least, but no need to make it really pretty. Then, I'll get the link to this website and that's what I'll post on Facebook.