Never post your domains anywhere online nowadays, until you really registered the domain and the DNS entry is pointing to your server.
https://news.ycombinator.com/item?id=96246
Plus ça change.
So, I decide, when I will buy my big domain, will make checks from some hosting like cf, or just download full list of all domains I could consider, and run all searches locally.
Lots of time, nerves and money saved.
Until after your domain is purchased, or you know who the current registered owner is, the domain you are shopping for is a closely guarded secret, more valuable than a master password.
Assume everyone (slack, msteams, your browser extensions, your firewall, your corporate VPN, your co-worker's electron apps) is snopping on you and will get a commission for leaking your domain to the fronting groups.
Domain squatters charge a minimum of that's at least $2000.