Not sure, but I think that designing an internet measurement in a RIPE Atlas network might just fit this task? https://atlas.ripe.net/probes/ You have micro cuts, but are those only to the big name websites or to something local as well? Might help answer that, and give ISP data on where exactly are they hitting the bottleneck and what are they missing monitoring.
Is it possible to connect docker / podman directly to the router? I’m operating an L2 bridge https://developers.redhat.com/articles/2022/04/06/introduction-linux-bridging-commands-and-features systemd-nspawn containers can connect to my router directly, but how to do it with docker / podman?