I don’t know what happen when you block instances, but when I’ve blocked entire instances, post comments simply dissapear, not from the instance mind you, random posts comments will just not show up (this is a known but when KBIN users block instances, and has been addressed a number of times, but not fixed by @earnest text below)

e569668

if you aren’t seeing comments or your thread, unblock all domains you have blocked, your threads have been posting fine, but there’s a bug where kbin.social users can’t see comments if they block any domain ( https://codeberg.org/Kbin/kbin-core/issues/1019 ) . you can also try viewing the thread logged out
https://kbin.social/m/AskKbin/t/452867/Is-KBIN-dying-Srs-Question-Is-there-any-further-development