There is no functionality for this mod in current state (no display for extra resource obtainment info, no matter which item is selected).
Fabric 1.20.1
JustEnoughResources-Fabric-1.20.1-1.4.0.222.jar
latest.log

Seems to be related to sniffer, from the log

Suppressed: java.lang.IllegalStateException: Unreferenced key: ResourceKey[minecraft:worldgen/biome / snifferplus:timeless_grotto]

So, this checks out. I tested with only fabricAPI, JEI, JER, and Sniffer+ (JER does not work):
log_jei&sniffer.log
and only fabricAPI, JEI and JER:
log_jei_without_sniffer.log
Is this an issue on JER or Sniffer+ mod's side? I can report it there