Modifying the world height to 2032 via the built-in configuration of Tectonic-3.0.17 results in significantly slower chunk loading and world creation. In contrast, using Tectonic-3.0.12 in conjunction with the 2032-world-height data pack does not cause this issue. This has forced me to stick with version 3.0.12.
https://modrinth.com/datapack/2032-world-height
1.20.1 fabric