If you can map a network drive (very east fstab edit BTW), then yes, its a great way to go.
That’s what I do, I have two 5-bay NASs, both use all 4 uplinks (LAG) to my switch, and my media server is an LXC on an 8th gen intel, with GPU passthrough.
If you reboot your nas, you may need to reconnect from the server. If you reboot your server, you dont have to do anything since its connecting when it starts up. If you end up needing more space, you just mount that new NAS alongside it.