I'm experiencing a similar issue with my site, nuancelabguitars.com.au, suddenly getting deindexed. I've reached out to Bing multiple times, but all I've received are automated responses. It's frustrating not getting personalised assistance or a clear explanation.
This is the automated message from Bing Webmaster
*After further review, it appears that your site https://nuancelabguitars.com.au/ did not meet the standards set by Bing the last time it was crawled.
Bing constantly prioritizes the content to be indexed that will drive highest users satisfaction. Please review our Bing Webmaster Guidelines, to better understand criteria for most valuable content.*
