A simple Google search brings up many sites with templates. None run by Adobe though.
adobe exchnage: https://exchange.adobe.com
Although I'm not sure how useful that will be, you might be better looking at third party websites, as Dreamweaver has support for Bootstrap I'd say that Bootrap 4 templates might be a way to go - depending on your level of knowleadge?. Google Bootrap templates and you'll find 100s of free and paid Bootrap templates.
If you had at least a good grasp of HTML and CSS then non-Bootstrap/cleaner HTML/CSS templates will be better IMO.
What kind of Template are you looking for?