As with so many emergency preparedness things, circumstances are everything. GMRS/FRS with randoms out there might be fine, if she learns how to scan channels and deal with privacy codes. A Ham Radio license would be amazing (with appropriate accompanying equipment, such a UV-5R). But I assume both of these options require too much training.
If money is truly of little concern, then I suggest a satellite phone or a satellite communications device, if she values portability. Such as SPOT. She might also hold out to see if Apple is really building some form of satellite communications into the next generation of iPhones (announcement regarding new generation of phones coming mid September).
If she's planning to stay in place (and her environment makes that a reasonable outcome, I.E., not wildfire/earthquake country), then she could copy me. I have Starlink satellite internet currently with an UPS and generator as backup power sources, but with solar and a whole house battery system on order.
Starlink does rely on a clear view of the sky, which was difficult for me to obtain. Now that I have things setup though internet stability and availability are very good, even in Beta. I in fact cancelled my other internet service. My reason for getting Starlink was at least in part because last summer when I lost power for day or two my cable internet went down after 4 hours (battery life of their backhaul equipment, apparently), even though I had power (generator) at my house the entire time.
Starlink with battery backup also offers the highest ease of use. Once setup she could lose power and her neighbors could lose phones/internet and she could continue to use her (say) iPhone as normal on wifi without even knowing her neighbors are down.
If she's really nervous, she could get Starlink ($99/month) as a back up to her primary internet. That's probably overkill. Cell phones with wi-fi calling turned on make calls just fine over starlink in my experience.
Assuming this is all over the top and GMRS/FRS are the solution, then I suggest that she buys a few sets of these and hand them out (with batteries), preconfigured, to the neighbors she wants to be able to talk to:
https://www.outdoorgearlab.com/reviews/camping-and-hiking/walkie-talkies/motorola-talkabout-t100 https://www.amazon.com/AmazonBasics-Perf...2dDbGljaz10cnVlIf that's the path she goes with then she and her neighbors (that I hope she's friendly with) should really test their setups once or twice a year so they're ready in a pinch.