I’ve just given it a little check and Topic List Previews (TLP) doesn’t take into account ignored content when displaying the preview:
It also seems Discourse Tooltips displays the actual text too:
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Ignored user functionality | 1 | 724 | October 3, 2019 | |
| Topics created by ignored users showing on homepage | 24 | 3377 | May 26, 2026 | |
| Allow "Ignored content" to be temporarily overrided per-post | 1 | 86 | November 26, 2025 | |
| Viewability of hidden Topic text from an Ignored user | 1 | 126 | April 15, 2025 | |
| Hide ignored users' topics | 33 | 1918 | March 30, 2025 |