I tried to setup PrimeFlex (3.0.1) for PrimeFaces (10.0.0). I used css files as provided in dist folder of PrimeFlex repo. Also I followed the instructions give
asp.net-core-2.2
alt
application-xml
mlp
mongotemplate
ape
x-accel-redirect
stdafx.h
dart-null-safety
cumulative-sum
ngx-mydatepicker
wiimote
python-socketio
git-bare
spring-java-config
mac-frameworks
react-native-modalize
maven-lifecycle
symfony-messenger
openjms
icsharpcode
office365-exchange
service-fabric-stateful
sqlapi++
cartogram
hla
turkish
clickup-api
rxfire
pyral