No, unfortunately it's not that convenient since the hash is of the hole file. Also it would defeat the point of using the hash if something in the file could change
Discussion
Thanks for the confirmation. I'm working on rebuilding nostr:npub1yvgrrzf4dnmu30qfhw95x87ruu0g2kpv3a64h8hpvqsre8qeuspsgd6pv9's MSP with nostr:npub10z4f5xu9g4rjjvqx4zhhn9hnrqddpczlchq4w3v0wn6430u838hqdlx7l3 and nostr:npub1l5hwyh7saazz4gdhgp9fx4939e25asx74kq6dj9ahrx69lcfxulsudhdrf is my guinea pig for testing these Nostr hosting solutions.
MSP 2.0 will host feeds for users so the issue is solved at least for me.