e.g. The minecraft bot Voyager can explore the game environment and extend its skill library(stored as a vector database), is that considered as innovation? There are also systems like leandojo/alphaproof that discover new proofs and use LLM in non-trivial ways(not just naively predict the next token in one shot). Reinforcement learning algorithms like AlphaGo/AlphaZero use self play and use monte carlo tree search to learn to outperform humans. You can similarly use LLMs to generate actions and estimate state values(check the language agent tree search paper).
Most people use LLMs by prompting them with some additional context(chat history and data retrived from database) but there is nothing that stops us from continuously improving a LLM(either by modifying its weight or augmenting it with external database) by asking it to evaluate the task outcome/error message and feeding it back to the LLM. We can also ask it to just keep on generating new tasks to experiment with the environment/internet to get new knowledge.