Tested in an isolated test instance using:
MC version 1.21.1
NeoForge 21.1.219
Mod list:
jei-1.21.1-neoforge-19.27.0.340
utilitarian-1.21.1-0.18.0
When changing config/utilitarian-server.toml => noSolicitingEnabled to false, several recipes hide in JEI that don't seem to be related to soliciting and probably should stay.
Default config vs noSolicitingEnabled turned off:

The list of items that go missing in this config change are:
utilitarian:white_soliciting_carpet and variants
utilitarian:restraining_order
utilitarian:no_soliciting_banner
utilitarian:no_raider_block
utilitarian:fluid_hopper
utilitarian:trowel
utilitarian:tiny_coal
utilitarian:tiny_charcoal
utilitarian:unname_tag
utilitarian:slime_bucket
The soliciting carpets, restraining order, no soliciting banner going missing makes sense. I'm not sure about the utilitarian:no_raider_block, whether that should instead be controlled by the noRaiderEnabled module config. The rest however likely should stay showing.
Note that this seems to be just strictly an issue of them not showing in JEI, if you know the recipe and craft them that still works (tested it with trowels).