bandwhich
Terminal bandwidth utilization tool
...It will also attempt to resolve ips to their host name in the background using reverse DNS on a best effort basis. bandwhich can be installed using the Rust package manager, cargo. It might be in your distro repositories if you're on linux, or you can install it via rustup. Cargo installs bandwhich to ~/.cargo/bin/bandwhich but you need root priviliges to run bandwhich. To install bandwhich on OpenWRT, you'll need to compile a binary that would fit its processor architecture. This might mean you would have to cross compile if, for example, you're working on an x86_64 and the OpenWRT is installed on an arm7.