@menherahair@deprecated_ii@kahboom Some endpoint returning semi-manually curated list of such instances together with FE option to indicate and/or auto-collapse posts from them might be useful, will poke it at weekend.
@kahboom@deprecated_ii If it is in this list: https://fba.ryona.agency/?domain=eientei.org - you can be relatively sure it does not. Some may not advertise defederations, no general way to know in advance in this case. Checking /api/v1/accounts/lookup?acct=someone@eientei.org for mastodon and pleroma instances may also sometimes indicate if local accounts were disabled.