one other thing i would suggest is to set up a catch-all email for the domain and see what gets sent to it, sometimes you can access accounts associated with the domain, socials etc
I set up a catch-all for personal use and wasn't expecting to get flooded with emails.
I was getting business emails, people trying to send money by Zelle, etc.
I was kind of hoping to get something good that I could take action on in the market, so I left it on for a little bit, but then I felt bad that people's emails were not getting answered (at least bouncing), so I turned off the catch-all. Oh well.
