There is an incompatibility in the Prominence Modpack (an potentially elsewhere) where the player is able to teleport down with the Tech Reborn Elevator but not up. It can be resolved by uninstalling the amecs mod.

Relevant Issue:
nvb-uy/ProminenceII-HasturianEra#36

Relevant event code (maybe):
https://github.com/TechReborn/TechReborn/blob/1.21/src/client/java/techreborn/client/events/ClientJumpHandler.java
https://github.com/TechReborn/TechReborn/blob/1.21/RebornCore/src/client/java/reborncore/client/ClientJumpEvent.java

Observed in mod version 1.3.10 + Minecraft version 1.20.1