For HTTPS logs going back to Dec 2020 to the present, I have 75 log lines that have bing somewhere on the line (all microsoft IP's already removed so these are not bing-bot). I can't easily search a specific field - I'm using grep.
47 of these 75 are HEAD's (boils down to only 21 unique IP's). The referrer for all of those is simply [
bing.com....] I picked 3 of those and re-scanned the logs to see if they actually requested any files (as a human browser would). They did not. The HEAD was the only thing they did. So those are garbage.
For the remaining 28 (22 unique IP's) most referrers are www.bing.com, one is cn.bing.com, and the rest are www.bing.com/search?q=semalt.com, I chose one of those IP's (an academic institution in Japan) and went down a bit of a rabbit hole with that IP (about 1/2 dozen hits this year, not a bot). I see google, bing, and search.yahoo.co.jp as referrers for these hits (and some are direct, no referrer).
I haven't scanned for hits that would have started as http with bing being the referrer, presumably the referrer would be preserved when the redirect to https is followed.
I could repeat this log scan - looking for google being the referrer, just to get some stats out of this. But I think clearly getting referrals from bing is very rare (for me), I see quite a lot from google.