Sure, there are several features to Nostr Sites.
You can write some HTML code into a nostr note, and paste the noteID into the main page. In about 10 seconds, it will render your code and give you a url associated with the noteID.
There is an option to fill out a form, and it will give you some HTML you can use to create a default link tree. Or you can write with markdown, and it will convert it to HTML. Then you just copy this HTML code and paste it into your favorite client.
And finally, there is a paid service that gives you several cool features. You will get a custom url (nostrsites.com/btcapsule), and the option to use additional frameworks like jquery.
You can check out my link tree below, and here is the noteID with the code:
nostr:note1jyma6pkue2jz6aqn3nstve0rxlh6hfrfanevg69jlzktluwlkpzq7s6j4g