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Already has been, although just small bits at present:

US 2200m band 135.7 - 137.8 kHz US 630m band 472 - 479 kHz

These became available in 2017 in US, following the agreement of the International Telecommunication Union's 2007 and 2012 conferences.

It's not really much use for anything. What "interests" would you think are interested in it?

What are they wanting to build? It’s hard to put much information on lower frequencies, afaik?

I bet it will have to do with the military, almost inevitably.

With the risks to GPS becoming more acute, many jurisdictions are seriously entertaining bringing back a modern version of LORAN.

There's also high frequency firms that want to muscle their way into shortwave frequencies as they can have lower latency between trading sites (eg NYC and Chicago) since the physical infra isn't a direct link as the crow flies (as well as the speed of light being slowed in fiber optic lines). They've even restarted some microwave links, as they don't necessarily need a lot of bandwidth, just latency.

LORAN was actually pretty awesome.