I have some for the demo.peer.observer nodes here: Historical Bitcoin Core IP address manager snapshots (via getrawaddrman) (added last week).
Also, in peer-observer, with the rpc-extractor, we query both getaddrmaninfo and getrawaddrman since recently and generate various addrman metrics with the metrics tool.
For example, the I2P addresses in the addrman tried table (we tried this address and there was a reachable node behind it) has been declining slowly since the I2P attack started on 2026-02-03:
(time range is “past 14 days”)