Lets hope so. I did not yet check. But as is the architecture of Nostr, it is defnitly built on [NIP-23](https://github.com/nostr-protocol/nips/blob/master/23.md)
So most relays may do not implement this nip and therefore do not allow it. So you have to search some that allow it.
nostr:nprofile1qy88wumn8ghj7mn0wvhxcmmv9uq32amnwvaz7tmjv4kxz7fwv3sk6atn9e5k7tcpr9mhxue69uhkscnj9e3k7unpvdkx2tnnda3kjctv9uqzp978pfzrv6n9xhq5tvenl9e74pklmskh4xw6vxxyp3j8qkke3cez0c7vk7 on which relays do you publish longform?