I was unable to get it to work in any way; this is unusual. Could it possibly be due to a plugin? For example, I am doing it this way, but the normal homepage still appears:
trust_level_0:/discourse-ai/ai-bot/conversations
trust_level_1:/discourse-ai/ai-bot/conversations
trust_level_2:/discourse-ai/ai-bot/conversations
trust_level_3:/discourse-ai/ai-bot/conversations