Are you using a custom rom? I don’t have this option on my oneplus 9 pro. but I have something else.

yep. you are right.

There shouldn’t be an arbitrary limit on the length of a password but how is 20 characters “way too short”? It’s more than 10^36 combinations.

I am also using open webui. Most LLMs are too verbose for me, so I created a model in open-webui with system prompt “Do not repeat the questions. Avoid giving lists as answers. Do not summarize the answer at the end. If asked a follow-up question, respond with only new information, do not repeat previously stated information.” and named it No Nonsense.

Laws do not, did not ever, guarantee interception. It always allowed the police to try to intercept. The police hid bugs, tapped wires. Never in history the police said "for lawful interception to happen, all phones must come with preinstalled wiretap. The implication that “communications systems are too secure, there has to be a backdoor for lawful interception” is a fallacy.