Custom System Prompt per chat

Greetings,
As a new user, I am considering subscribing to T3Chat, however, the biggest and most important thing that it’s missing is that I can’t use my usual system prompts well, instead of the 3 part-customization, my need would be a full-advanced customization panel specific to EACH chat session, so basically system prompt (Full access), Token limit, temperature, etc. Which most similar platforms have.

Thanks for taking the time to read this.