Telegram is in very big trouble all the time for refusal to comply with court orders they're capable of complying with, which is related to E2EE.
Famously, Signal complies with court orders by giving up all the data that's requested that it has, which isn't very much. This is what you expect from E2EE platforms.
A court order to do the impossible is invalid. Telegram gets in trouble because it's possible for them to comply but they choose not to. Subpoenas are usually worded as "you must provide all information you have, relating to ..."
Meanwhile, if you believe that any Governments actually refrain from prosecuting Signal executives due to their refusal and/or inability to produce the messages from private chats because they have E2EE, well, I've got a nice bridge to sell you.
If they actually are refraining from going after Signal executives in a similar fashion, most likely either 1. Nobody is actually using it for anything interesting, 2. They are actually secretly cooperating somehow, or 3. Governments are already happy with other technical means of extracting the contents of Signal chats they are interested in. See the US FBI's curious sudden lack of interest in Apple's ability, or lack thereof, to extract a wanted suspect's iMessage messages.