Is there anything like Private Key Generator
Yes.
or Private Key Finder
Not a meaningful one. Large Bitcoin Collider is working towards it, but if a Bitcoin wallet randomises private key generation properly, the chance of that private key then being found is negligible.
If you want to understand how ridiculous the prospect of breaking 256-bit security is with current technology, look at
this site and try going to a high-numbered random page and see if there are funds in any of the addresses. There aren't, because the number that are being used is almost none compared to the total number that there ever could be.