Hi @xgp ,
Thank you for your answer. I already declared the configuration for my customized theme selector provider in standalone.xml but I cannot find where I can change the setting to use my theme selector provider. Could you give me some hints?
Besides that, I found a discussion that shows us the way to set the customized theme selector by default here. But I think it would be better if we use the official way that we can change the setting in the Keycloak UI.