My bad.
It's not you. I haven't been to Bing’s WMT page in--literally--years, and had to go refresh my memory. (Whereupon I find, hilariously, that there is no need to dig up my password, because one of their signin options is ... wait for it ... Google. wtf?)
After searching in vain for the Site Move function, I consulted The Search Engine That Is Not Called Bing, leading to this rather priceless line from a disgruntled user of the
Microsoft Community Hub [techcommunity.microsoft.com]:
Rather than admitting that Bing has taken down yet another useful tool for webmasters, you simply try to redirect us to an FAQ page that does not answer the question OP asked
This comes at the very end of a thread, and I must say Google has accurately chosen the most relevant page snippet ;)
<tangent>
As long as I was there, I looked at their "top insights" and found that they complain bitterly about (1) many pages having too-short titles--but can’t be bothered to show the titles they don’t like (do they think the <title> is supposed to contain the full text of the "content" meta?), (2) Missing or Undiscovered Sitemap*, while giving no reason to suppose there is any part of the site they couldn’t find, (3) meta robots "noindex" tag on, wait for it,
pages I don’t want indexed, (4) and lastly "IndexNow not adopted", which I can't even be bothered to investigate.
Phooey. I can dimly recall a time when Bing’s webmaster tools were in some ways better than G’s.
</tangent>
*
In fact I used to have sitemaps, but took them down because it wasn't worth keeping them up-to-date when every part of every site is readily discoverable by humans.