An overlay for repeaters that shows a timer, which counts down until the repeater activates if it gets powered or counts down until the repeater deactivates, if it gets unpowered. Idk if that would be possible, but it would be useful especially with the carpet mod /tick freeze command.

The client does not know about the timings. I'm not sure how tick freeze works on the client, if the client has Carpet mod does it also freeze the client world ticks? If not then this would go all wack during tick freezes anyway, since the client world would keep ticking. And hooking up some kind of data sync to repeaters might be somewhat bandwidth intensive.

So basically this type of feature might be somewhat problematic overall. It would be more feasible to just show a text overlay for the single repeater you are looking at, but even in such a case, it would probably only work sanely in single player.

Thanks for the answer! Idk how carpet mod tick freeze works. I just wanted to suggest it, but it sounds definetly logical that it would be very hard to implement!