Thanks, you guys are great! I've been indisposed, but quickly for now...
It's a 2017 Dell Inspiron 3650. I found a post for WOL issues on this model,
http://www.fileerrors.com/dell-inspiron-3650-unable-to-wake-from-sleep.htmlthat recommends downloading a "repair tool," but I'm not inclined to download a tool not from dell.com, and will check BIOS from the dell.com link you sent. I found other dell.com WOL-issue posts for the 3000-series, with solutions setting the Realtek adapter (ethernet, unlike my all-wifi set up; all devices on the same Linksys EA7300 LAN).
For the internal Qualcomm adapter, Windows Device Settings indicate it is WOL-capable. Power management properties (on/off) are: "allow the computer to turn off this device to save power" and if that is checked, "allow this device to wake the computer," which if checked enable the option to "only allow a magic packet to wake the computer." I think I've tried every variation of those properties but will try again methodically, to be positive.
(The Google Fiber router was in bridge mode, but after I needed to look at settings and power it down once, its network started broadcasting, and I let it be. User error no doubt, thanks for the advice, I'll find its bridge mode setting.)
Thank you again. I'll try everything I can and report back when I find a solution (or not).
Best, Rick