Is there any sort of automatical signal detection tech out there. i.e. something that identifies part of spectrum that aren't noise automatically?

The cheap SDRs have pretty narrow receive windows so would be helpful

The way I read your question, anything that will display a waterfall is what you want; you'll see crystal clear that there are signals wherever they might be, and you can just click/tune over to that frequency. You typically can zoom in or out on that waterfall to cover broader or narrower ranges.

You can get this with either full on (expensive!) radios, or with a cheap RTLSDR dongle paired w/ appropriate software on your computer. And to what you said about cheap SDRs... 24 to 1766 MHz isn't a particularly narrow range from my point of view, but if you're willing to spend some more money, the HackRF One will cover 1MHz (160m band) all the way on up to 6GHz (wifi). Going lower or higher than that probably needs more specialized stuff.

(And of course, appropriately tuned antennae hooked to the radios/dongles)

I do have a hack rf one just not unboxed (for a while it sounded like UK might ban SDR sales so preemptive buy).

I was under the impression that the spectrum is quite large relative to what you can look at with a waterfall and thus would take forever. Based on your comment sounds like I might need to take another look!

You might also want to take a look at "RF Explorer Spectrum Analyzer"; nice handheld devices with varying frequency ranges - https://j3.rf-explorer.com/

Specialized hardware exists for that. Google for "spectrum monitoring".